Database Develop

[Q] XT890 - Data Roaming Issue

Hi Folks,
I hope you can help me with a data roaming issue I am seeing on my RAZR i. I have data roaming disabled in the options.
There seems to be a lag of some kind, where the RAZR i will not recognize a cell/operator switch while in standby/locked mode.
I can reproduce the error everytime - I have the phone locked and connected to my bluetooth handsfree in the car - it will show my home network operator. I cross the border and drive to a point where I know 100%, that I have lost home operator connectivity. The BT handsfree will show my home network operator - data will be sucked in the background, since the phone believes it is still booked in under my home country operator.
I helped myself by setting my contract to explicitly activate roaming everytime by sending an SMS message - I am getting the notification SMS everyday, that data roaming has to be enabled, and I am now trying to consume data in a foreign country....
As soon as I press the power button and wake the phone up, the network operator will immediately switch to the foreign countries operator and data roaming activity will cease...
I have tried this well over hours already as well, to leave it in standby state, to see if it will eventually recognize the operater switch, but even after 6hrs at my workplace (50km away from the border) it was still showing my home countries operator.
This has happened to me on ICS 4.0.4 as well as JB 4.1.2 - I thought the update might resolve it.
I am stock JB Retail EU, unrooted (thanks Moto) and locked BL.
Anyone else observing this or able to reproduce the fault? I have opened a ticket with Motorola but their first "repair" attempt was to flash the latest firmware again, which did of course not resolve the error....
thanks a million for your time reading this and maybe offering some insight on what might be causing the issue.
cheers, Stefan

Out of curiosity, is this your first Android phone? And also do you have data to show that other Android phones switch instantly when crossing the border?
(Not trying to be rude, just that the expectation on that behavior might not be feasible and it is not the Phone's or Motorola's fault, I have no idea at the moment)

Omar-Avelar said:
Out of curiosity, is this your first Android phone? And also do you have data to show that other Android phones switch instantly when crossing the border?
(Not trying to be rude, just that the expectation on that behavior might not be feasible and it is not the Phone's or Motorola's fault, I have no idea at the moment)
Click to expand...
Click to collapse
Appreciate the quick response Omar, and no worries I don't see your question as rude. This is indeed my first Android phone, however - I think a fundamental function like Data Roaming should work immediately when the event is about to occur, since it can inccur significant cost..
When it is switched off, I expect the phone to not download data when it is on a foreign network, so I assume it would be an easy thing to "program" polling cell-information again before I start the download, no?

StefanGA said:
Appreciate the quick response Omar, and no worries I don't see your question as rude. This is indeed my first Android phone, however - I think a fundamental function like Data Roaming should work immediately when the event is about to occur, since it can inccur significant cost..
When it is switched off, I expect the phone to not download data when it is on a foreign network, so I assume it would be an easy thing to "program" polling cell-information again before I start the download, no?
Click to expand...
Click to collapse
Need to block international roaming - I live near Canadian border
Since we do have that option to select "Home Only", see if that makes a difference. I think that might even block the phone calls too .. but try it as a first approach.

Omar-Avelar said:
Since we do have that option to select "Home Only", see if that makes a difference. I think that might even block the phone calls too .. but try it as a first approach.
Click to expand...
Click to collapse
I am not sure where to find the "Home Only" option.. I looked through the data and phone menu - where is it located? Maybe it is not available on the "Retail" phones?

StefanGA said:
I am not sure where to find the "Home Only" option.. I looked through the data and phone menu - where is it located? Maybe it is not available on the "Retail" phones?
Click to expand...
Click to collapse
Oops, I couldn't find it ... maybe it was there on ICS? But you can also try under Network Operators try unchecking "Choose automatically".

There's an option for data roaming under Mobile Network settings, just uncheck it if it's enabled...

nick7722 said:
There's an option for data roaming under Mobile Network settings, just uncheck it if it's enabled...
Click to expand...
Click to collapse
This is what I have unchecked from the very beginning, but the issue is, that the phone is not obeying that setting.. thus the thread...
@Omar-Avelar, I don't have my Razr currently to check your suggestion with the operater selection - Motorola had me send the phone in another time, "to fix it" - so apparently they are admitting there is an issue in the way it is behaving.. I wonder if anyone else has the issue or it is just my phone - which would mean hope in terms of an "easily repairable hardware defect"...

Omar-Avelar said:
Oops, I couldn't find it ... maybe it was there on ICS? But you can also try under Network Operators try unchecking "Choose automatically".
Click to expand...
Click to collapse
Hi Omar, received my phone back yesterday - tried this morning and of course it is still not working.. I will try your suggestion of disabling the automatic network selection tomorrow morning on my way to work and see if that works.
What I did notice, is that I seem to have a different baseband version, than the official specs are suggesting:
according to this site:
http://pdadb.net/index.php?m=reposi...0_android_4.1.2_ota_system_upgrade_91.2.26001
the baseband is supposed to be:
SUNRISE_SMB_REV30_V2_R3_1233.C7_sec
however, my phone is showing:
SUNRISE_SMB_REV30_V2_R3_ENZO_1251.B_SEC
the name somehow smells custom made fishy to me - I am sure I never messed with this however. My girlfriends Razr i is showing the same version and I know she never ever touched it other than doing the OTA upgrade, so I wonder if there was a faulty OTA distributed at some point?
Could this be the culprit? If so, can I switch to the "correct" baseband without unlocking/rooting?
Really appreciate all your feedback and help so far.
cheers, Stefan

I'm in the UK with a retail UK firmware and the same baseband as yours.
Sent from my XT890 using xda app-developers app

kenrw7 said:
I'm in the UK with a retail UK firmware and the same baseband as yours.
Click to expand...
Click to collapse
Thanks for the feedback, do you have a chance to test, if you are having the same issues disabling roaming capabilities?

StefanGA said:
Thanks for the feedback, do you have a chance to test, if you are having the same issues disabling roaming capabilities?
Click to expand...
Click to collapse
I'm on Tescomobile (O2 provide the network) and have my data roaming off and the phone never locks onto another provider, as I understand the problem for you is when cross a country border which I don't (being an island and no borders) I'm due to go to vacation in South of France in 5 weeks and I'll check then whether my roaming switches on when I change to another provider there.
Have tried select another network (Orange) but cannot connect,
Hope I understood your problem.

kenrw7 said:
Hope I understood your problem.
Click to expand...
Click to collapse
yes, you got it exactly right. I have no issues within my country (Germany) either, phone stays on T-Mobile and never locks onto another network (O2, Base, etc..), it is like you said, when I switch to another countries roaming partner, the phone in standby mode still believes to be in the home network (T-Mobile).
Watch out in France then, although the issue might not be happening for you - assuming you fly in and switch off the phone. Once you reactivate the phone in the foreign country, it will be actively pulling and seeing the foreign operator I suppose.. In my case the phone switches countries in the background in standby, thus not actively searches/recognizes the change... at least this is my current theory that would match the behavior that I observe on an external hands free unit display...

Right I'll watch it when in France, might even make a working visit to Munich before then. I do know when I went to Hoogeveen in Jan I had a xperia go and that retained roaming off when on kpn.
Sent from my XT890 using xda app-developers app

Hi @Omar-Avelar,
I tried your suggestion this morning and disabled automatic network selection - guess what, I am observing a similar behavior.
The phone does in fact loose network connection at a point when the home network is no longer in reception, but the phone/hands free unit is NOT updated.. it keeps saying "Telekom.de" and shows 3 bars.. Even turning off the external bluetooth hands free unit and disconnecting the bluetooth link, then re.enabling the bluetooth link on the hands free, does NOT update the network operator status. You have to wake up the phone for it to realize it is disconnected from the network.... (good news obviously in the state of being disconnected from the network there is by the nature of design no possibility to retrieve data....)
My non-technical skills tell me, that the baseband is doing it's job of handling the network connections/operations properly, but when it comes to passing on the network piece to the "software/android side" this is where the disconnect is. Obviously the roaming setting is an android feature, that is not handled within the baseband, so if the phone/software doesn't know what's going on, it can't interact.
Any suggestions? fixable? did you take a look at my previous post on the baseband version?

kenrw7 said:
Right I'll watch it when in France, might even make a working visit to Munich before then. I do know when I went to Hoogeveen in Jan I had a xperia go and that retained roaming off when on kpn.
Click to expand...
Click to collapse
Hi there, how did your trip to France work out? Did you run into the roaming issue?

Hi @Omar-Avelar,
I think I made some progress - I believe the culprit is the intel deep sleep mode. When I interprete the sources correctly, the RAZR i enters deep sleep mode directly when going into standby/phone is locked/screen turned-off. To prove my theory, I installed "WakeMyAndroid" ( https://play.google.com/store/apps/details?id=com.gejos.android.wakemyandroidpro&hl=en ), the program is intended to prevent deep sleep mode and keep the phone in standby.. I set the timing to 9 sec and advanced invisible smart wakeup, as well as force wake if data lost - guess what, it works. Network operator switches and the phone immediately turns off data roaming.
Downturn of course is increased power consumption, since the phone never enters deep sleep. It brings me still over the day, so it is an acceptable workarround, I may play with the wake interval, too to increase usage, but I guess there should be a way to check network status in deep sleep mode, no? I am not a developer, so I don´t know what would need to be done, but shouldn´t it be able to poll network status in deep sleep every couple of seconds? Or rather a baseband function to "invisible wake" the phone when network operator changes?
Hope you or anyone else reading this, can help me. Appreciate your time.
cheers, Stefan

Hi @StefanGA do you have any tips or update on the issue?
In my country we pay data traffic by just roaming with another operator (within the same country). Because the signal of my current operator isn't always good, the roaming happen often, resulting in a lot of additional 0,01€ - 0,03€ that pile up.
Thanks

Sorry, Motorola admitted, they have no solution to the problem - I.e. No interest to invest time to research it.. I returned my RAZR i and exchanged it for a RAZR HD.
Sent from my XT925 using Tapatalk

[Q] H+ gone, can make calls; don't know what to look for.

Hello friends,
I have the Z for almost two years now, and have had a issue for a long time; here goes:
A long time ago, I started flashing roms, and everything was all right. After a few months I noticed that I had no H+ any more.
Because I thought that the TELE-2 service was horrible I left it. Eventually I thought I was shut off, and because I'm more of a WiFi user, I left the issue.
Now, after a year, I decided to call TELE-2 and they tried to help me restoring my APN settings. Everything was all right but I still can't use 3g.
I can make calls, but as soon as I turn off WiFi, my network connectivity disappears and shows a exclamation mark.
entering *#*#4636#*#* gives me some information, but I'm not sure what to make of it. Roaming is enabled, HTTP client test gives:
FAIL: IOexeption.
I'm thinking this has something to do with my modem/ baseband?
Can someone point me to a correct thread because I'm not even sure what this issue is called.
Or perhaps teach me how to treat network connectivity issues in the future?
If further information is needed I'll fill it in. Remember, I have some knowledge, but I'm still pretty much a noob!

Bump?

Nyahaha1171 said:
Hello friends,
I have the Z for almost two years now, and have had a issue for a long time; here goes:
A long time ago, I started flashing roms, and everything was all right. After a few months I noticed that I had no H+ any more.
Because I thought that the TELE-2 service was horrible I left it. Eventually I thought I was shut off, and because I'm more of a WiFi user, I left the issue.
Now, after a year, I decided to call TELE-2 and they tried to help me restoring my APN settings. Everything was all right but I still can't use 3g.
I can make calls, but as soon as I turn off WiFi, my network connectivity disappears and shows a exclamation mark.
entering *#*#4636#*#* gives me some information, but I'm not sure what to make of it. Roaming is enabled, HTTP client test gives:
FAIL: IOexeption.
I'm thinking this has something to do with my modem/ baseband?
Can someone point me to a correct thread because I'm not even sure what this issue is called.
Or perhaps teach me how to treat network connectivity issues in the future?
If further information is needed I'll fill it in. Remember, I have some knowledge, but I'm still pretty much a noob!
Click to expand...
Click to collapse
Nyahaha1171 said:
Bump?
Click to expand...
Click to collapse
Well, I would think you have either unlocked bootloader wrongly (usually slight chance) or flashed wrong FTF/ROM for your device.
Now I would suggest you go to STOCK ROM for your device first. You can flash it via flashtool
You would need FTF from general section and also flashtool which you can get from here
http://www.flashtool.net/index.php
You can search xda for how to use it. If you still have questions, quote me and I would be glad to help

Hnk1 said:
Well, I would think you have either unlocked bootloader wrongly (usually slight chance) or flashed wrong FTF/ROM for your device.
Now I would suggest you go to STOCK ROM for your device first. You can flash it via flashtool
You would need FTF from general section and also flashtool which you can get from here
You can search xda for how to use it. If you still have questions, quote me and I would be glad to help
Click to expand...
Click to collapse
Yes, I tried it already, I found a Dutch Generic FTF, flashed it but it didn't work. If I remember correctly there was a option to only flash the Baseband/Radio.
I expected that something like that was broken and that reflashing the original might fix it. But alas, bad luck. Would it be a good idea to learn how to logcat?
Would it be helpful if I provided these?
Thanks in advance.

Nyahaha1171 said:
Yes, I tried it already, I found a Dutch Generic FTF, flashed it but it didn't work. If I remember correctly there was a option to only flash the Baseband/Radio.
I expected that something like that was broken and that reflashing the original might fix it. But alas, bad luck. Would it be a good idea to learn how to logcat?
Would it be helpful if I provided these?
Thanks in advance.
Click to expand...
Click to collapse
I would like you to check on your xperia Z box it's exact model number with baseband and every other detail you can provide. Also, tell me if you got it sim free or had a contract or something like that. Are you on unlocked bootloader ?

Hnk1 said:
I would like you to check on your xperia Z box it's exact model number with baseband and every other detail you can provide. Also, tell me if you got it sim free or had a contract or something like that. Are you on unlocked bootloader ?
Click to expand...
Click to collapse
On a contract, but warranty doesn't matter. Unlocked Bootloader, Rooted, currently running 5.1 Resurrection.
All right, here goes:
- C6603
- GSM/GPRS/EDGE 850/900/1800/1900& UMTS/HSPA Bands 1/5/8 & LTE 1/3/5/7/8/20
- SI 1270-4181.6 NL
- S/N: CB5A1TNCA0
Let's hope this suffices. I presume that by flashing a ROM with wrong Baseband in the
past my phone can't communicate with the towers in my area; because every part of the world uses different frequencies?

Nyahaha1171 said:
On a contract, but warranty doesn't matter. Unlocked Bootloader, Rooted, currently running 5.1 Resurrection.
All right, here goes:
- C6603
- GSM/GPRS/EDGE 850/900/1800/1900& UMTS/HSPA Bands 1/5/8 & LTE 1/3/5/7/8/20
- SI 1270-4181.6 NL
- S/N: CB5A1TNCA0
Let's hope this suffices. I presume that by flashing a ROM with wrong Baseband in the
past my phone can't communicate with the towers in my area; because every part of the world uses different frequencies?
Click to expand...
Click to collapse
Can you check which frequencies your network provider uses ?
Usually it's available on their websites. In the mean time I'll look for a ROM you can flash and see if that helps! We might be going to STOCK ROM !
Also check which model does your custom ROM shows!
In the pictures, you can clearly see the difference in basebands between C6602/03 models.

Hnk1 said:
Can you check which frequencies your network provider uses ?
Usually it's available on their websites. In the mean time I'll look for a ROM you can flash and see if that helps! We might be going to STOCK ROM !
Also check which model does your custom ROM shows!
In the pictures, you can clearly see the difference in basebands between C6602/03 models.
Click to expand...
Click to collapse
All right. I've tried to find out what frequenties my provider uses, asked around on the forum and it seems no one is willing to help me.
It seems they are not willing to disclose frequency information and keep changing subjects; also when other people ask this question.
This might make things a little harder. Also, you advised me to try out stock again, I'm willing to do this, but I have to say:
I hate Google. I hate them more than anything and would like to leave the stock experience as fast as possible.
Let us see what the steps are I should take now.
- Flash Stock ROM/Baseband
- ???
- Profit
As mentioned earlier, I tried this before, and it didn't work. So I must be missing something. Just in case I didn't explain my self well enough;
I can make calls, I can't use 3G/HSDPA. When using network monitor, everything fails, unless I reconnect with WiFi. My Bootloader is unlocked, and I
am rooted. Resurrection Team uses Evo kernel (Which I hate because it's pretty unstable.), However, My issues predate the kernel by far.
It seems I'm really failing in correctly flashing my device, because there always seems to be something wrong.
Either it gets extremely laggy, or it randomly reboots (2 to 3 times a day. Unable to reproduce.), No audio when calling unless on speaker and a plethora of other issues.
This could also explain why my internet doesn't work. But it seems unlikely for me to fail in correctly flashing my device for 2 years, don't you agree?
EDIT: Can't even use *#*#service#*#*, doesn't work like everything else.

Nyahaha1171 said:
All right. I've tried to find out what frequenties my provider uses, asked around on the forum and it seems no one is willing to help me.
It seems they are not willing to disclose frequency information and keep changing subjects; also when other people ask this question.
This might make things a little harder. Also, you advised me to try out stock again, I'm willing to do this, but I have to say:
I hate Google. I hate them more than anything and would like to leave the stock experience as fast as possible.
Let us see what the steps are I should take now.
- Flash Stock ROM/Baseband
- ???
- Profit
As mentioned earlier, I tried this before, and it didn't work. So I must be missing something. Just in case I didn't explain my self well enough;
I can make calls, I can't use 3G/HSDPA. When using network monitor, everything fails, unless I reconnect with WiFi. My Bootloader is unlocked, and I
am rooted. Resurrection Team uses Evo kernel (Which I hate because it's pretty unstable.), However, My issues predate the kernel by far.
It seems I'm really failing in correctly flashing my device, because there always seems to be something wrong.
Either it gets extremely laggy, or it randomly reboots (2 to 3 times a day. Unable to reproduce.), No audio when calling unless on speaker and a plethora of other issues.
This could also explain why my internet doesn't work. But it seems unlikely for me to fail in correctly flashing my device for 2 years, don't you agree?
EDIT: Can't even use *#*#service#*#*, doesn't work like everything else.
Click to expand...
Click to collapse
Thank you so much for your detailed response. We love as much information we can have to answer your queries better.
I was trying to find out your network baseband because this would help me establish which STOCK ROM to flash. To inquire about your baseband, call your network provider from your phone and ask them these questions. Tell them you need to know for a phone you bought internationally and want to know if baseband matches or not. They would tell you in a moment.
I am sure you must know alot about flashing but sometimes, some roms are specific for certain models. Like it might be for a different baseband but not for other. Usually flashing roms doesnot play with your basebands but if you got some home brewed rom which is made over stock, this can actually mess up your device. Same goes for kernels if they are directed at a particular model, and it can act differently.
I am not sure why you blame Google as Sony is responsible for producing this phone so maybe enlighten me a bit ?? Sony has got custom UI , not actually Google.
What I would suggest is that flash an older FTF like KITKAT or Jeally Bean to your device and see if it works. Next if it doesnot, update your device using SONY COMPANION and not flashtool. Sometimes this also helps.
By the way do you have an official Sony care near your place ?

Hnk1 said:
Thank you so much for your detailed response. We love as much information we can have to answer your queries better.
I was trying to find out your network baseband because this would help me establish which STOCK ROM to flash. To inquire about your baseband, call your network provider from your phone and ask them these questions. Tell them you need to know for a phone you bought internationally and want to know if baseband matches or not. They would tell you in a moment.
I am sure you must know alot about flashing but sometimes, some roms are specific for certain models. Like it might be for a different baseband but not for other. Usually flashing roms doesnot play with your basebands but if you got some home brewed rom which is made over stock, this can actually mess up your device. Same goes for kernels if they are directed at a particular model, and it can act differently.
I am not sure why you blame Google as Sony is responsible for producing this phone so maybe enlighten me a bit ?? Sony has got custom UI , not actually Google.
What I would suggest is that flash an older FTF like KITKAT or Jeally Bean to your device and see if it works. Next if it doesnot, update your device using SONY COMPANION and not flashtool. Sometimes this also helps.
By the way do you have an official Sony care near your place ?
Click to expand...
Click to collapse
I blamed Google, because I genuinely hate them. They step on people, and violate human rights many people died defending. But that's a different story. Alas, I eventually flashed Stock 10.3.1.A.2.67; the first rom my phone came shipped with. It didn't work either. I'm starting to think that something might be broken because I don't have warranty any longer that would be a bummer. But let's continue. I can't use Sony update service because my bootloader is unlocked. And last time I checked it couldn't be relocked right? Also, there isn't anything like a Sony center near me.

Nyahaha1171 said:
I blamed Google, because I genuinely hate them. They step on people, and violate human rights many people died defending. But that's a different story. Alas, I eventually flashed Stock 10.3.1.A.2.67; the first rom my phone came shipped with. It didn't work either. I'm starting to think that something might be broken because I don't have warranty any longer that would be a bummer. But let's continue. I can't use Sony update service because my bootloader is unlocked. And last time I checked it couldn't be relocked right? Also, there isn't anything like a Sony center near me.
Click to expand...
Click to collapse
i think you have lost some values from TA backup. Use flashtool to relock it and see if that helps. Did you make a TA backup when you unlocked it ?

Hnk1 said:
i think you have lost some values from TA backup. Use flashtool to relock it and see if that helps. Did you make a TA backup when you unlocked it ?
Click to expand...
Click to collapse
Nope, saw a thread coming by this morning, also about TA partitions. I'm afraid that at the time I wasn't aware yet of the TA. Is this really bad or can it still be saved? When flashing
a rom, does it get overwritten?
Also, the SI number on my box says 1270-4181.6, yet the customization version on the phone states that I'm running 1270-4975_R3B. Even though I found a Dutch version.
Is this correct?

Nyahaha1171 said:
Nope, saw a thread coming by this morning, also about TA partitions. I'm afraid that at the time I wasn't aware yet of the TA. Is this really bad or can it still be saved? When flashing
a rom, does it get overwritten?
Also, the SI number on my box says 1270-4181.6, yet the customization version on the phone states that I'm running 1270-4975_R3B. Even though I found a Dutch version.
Is this correct?
Click to expand...
Click to collapse
TA numbers are device specific and if lost, they can result in WIFI and Bluetooth problems for most users but it is rare. Sometimes relocking bootloader can fix these as well but you said you havenot been able to . Are you connecting in fastboot mode for that using flashtool?
I think you should look at this thread for SI number and try to change it accordingly. Remember only the first link is Xperia Z specific and other links for other devices which might work to change your SI
http://forum.xda-developers.com/xperia-z/general/info-xperia-z-firmware-customizations-t2287283
http://forum.xda-developers.com/xperia-u/general/change-si-easy-t2005562
http://forum.xda-developers.com/xperia-u/general/change-si-easy-t2005562
TA partitions have been successfully repaired by SONY service centres. you can mail them your phone and wait for them to return it back. Make sure you email/call before you dispatch your phone and make details accordingly!

Nyahaha1171 said:
Nope, saw a thread coming by this morning, also about TA partitions. I'm afraid that at the time I wasn't aware yet of the TA. Is this really bad or can it still be saved? When flashing
a rom, does it get overwritten?
Also, the SI number on my box says 1270-4181.6, yet the customization version on the phone states that I'm running 1270-4975_R3B. Even though I found a Dutch version.
Is this correct?
Click to expand...
Click to collapse
Hey I remember that you have not tried this so I thought you should give it a try.
Sony Emma Flashtool
http://developer.sonymobile.com/services/flash-tool/
How to use it
https://www.youtube.com/watch?v=g8azjXu4etI
Try repairing your phone with this and see what happens.
Quote me in case you expect a reply. Good Luck

I'm going bonkers! I'll pay you 50 dollars to fix me!

I have a Note 4 Sm N910L from Korea. I live here in Japan at the moment. I bought the phone properly over Amazon and its new. I bought a data sim for it and it was working perfectly for about 7 weeks then one morning when I woke up there was no signal I have tried everything - updated from 444 to 501 then downgraded again UP and DOwn Maaany times. If I go near the Docomo store I can get connected again and it will stay connected for the 3km back to my home and then go off again when I reach home and not go back on - so I know the hardware still works ( I guess). It now just continually says Limited service or "your card is not authorised to use this network". Ive tried many other sims in the phone, none work.
If you can give me a step by step COMPLETE guide with links to any files I need to fix it, I'll pop 50 dollars in a paypal account the same day I can make my first skype call again!!! First person's info that actually does the job gets the money.
Love my phone and Im absolutely &%$'ed without it.
Hope you can help (the wife is out buying some rope and a straight-jacket as I type)

kazbluesk1 said:
I have a Note 4 Sm N910L from Korea. I live here in Japan at the moment. I bought the phone properly over Amazon and its new. I bought a data sim for it and it was working perfectly for about 7 weeks then one morning when I woke up there was no signal I have tried everything - updated from 444 to 501 then downgraded again UP and DOwn Maaany times. If I go near the Docomo store I can get connected again and it will stay connected for the 3km back to my home and then go off again when I reach home and not go back on - so I know the hardware still works ( I guess). It now just continually says Limited service or "your card is not authorised to use this network". Ive tried many other sims in the phone, none work.
If you can give me a step by step COMPLETE guide with links to any files I need to fix it, I'll pop 50 dollars in a paypal account the same day I can make my first skype call again!!! First person's info that actually does the job gets the money.
Love my phone and Im absolutely &%$'ed without it.
Hope you can help (the wife is out buying some rope and a straight-jacket as I type)
Click to expand...
Click to collapse
I loved the way you exposed your problem. I don't come here with a fix but only with few suggestions (so I don't deserve the 50 bucks) :
- check the pins of the sim slot
- check the back screws also and tighten them a little bit
- in network settings try to manually set provider and also choose only one mode (no auto 2g/3g/lte) preferably 2g only
Envoyé de mon SM-N910C en utilisant Tapatalk

It has happened to me with another phone. Turns out my SIM had failed, so it needed to be replaced. Sometimes it happens and it's quite easy to get a new one, so that would be the first thing I'd do if I were you. I hope you fix the problem soon!

Thanks but I tried the sim contacts I didnt notice any screws loose (except my own of course) I'll check (though not hopeful). I appreciate any suggestions.

iridaki said:
It has happened to me with another phone. Turns out my SIM had failed, so it needed to be replaced. Sometimes it happens and it's quite easy to get a new one, so that would be the first thing I'd do if I were you. I hope you fix the problem soon!
Click to expand...
Click to collapse
Iridaki, thank you. I ve tried 4 other sims from my provider in it and they dont want to work either. I feel it is more a software problem as it was alright when i went to sleep one night and the totally banjacked when i woke up in the morning. Im not sure though, just a noob at all this. Thank you for trying to help though.

googy_anas said:
I loved the way you exposed your problem. I don't come here with a fix but only with few suggestions (so I don't deserve the 50 bucks) :
- check the pins of the sim slot
- check the back screws also and tighten them a little bit
- in network settings try to manually set provider and also choose only one mode (no auto 2g/3g/lte) preferably 2g only
Envoyé de mon SM-N910C en utilisant Tapatalk
Click to expand...
Click to collapse
I just looked at my settings and i am unable to find any page where I can choose 2g or 3g or 4. When I rooted the phone a few days ago I remember downloading phone info which let me choose but that made no difference. Now my phone is unrooted again.
Thank you though googy

kazbluesk1 said:
Iridaki, thank you. I ve tried 4 other sims from my provider in it and they dont want to work either. I feel it is more a software problem as it was alright when i went to sleep one night and the totally banjacked when i woke up in the morning. Im not sure though, just a noob at all this. Thank you for trying to help though.
Click to expand...
Click to collapse
Ah I see.
I think I know what's going on.
The N910L supports the following frequencies: GSM 900/1800/1900, UMTS 850/1900/2100 and LTE Band 1, 3, 5, 7.
Docomo don't use GSM at all, instead they use UMTS 800/1700/2100 and LTE Band 1, 9, 19, 21, 28.
Basically your phone is not designed for the Japanese market, as it only supports two of the eight frequencies used by Docomo. The reason you had signal and still have around their store is probably because there's a tower that supports the UMTS 2100 or LTE Band 1 frequency. So you either moved recently or perhaps you didn't but one of the nearby towers was switched to a different, unsupported by your phone, frequency.

kazbluesk1 said:
I just looked at my settings and i am unable to find any page where I can choose 2g or 3g or 4. When I rooted the phone a few days ago I remember downloading phone info which let me choose but that made no difference. Now my phone is unrooted again.
Thank you though googy
Click to expand...
Click to collapse
In network settings , there should be a submenu where you can change it. You can also directly access it with long press on data connection icon in notification drawer
Envoyé de mon SM-N910C en utilisant Tapatalk

Service mode
try this code in the dialer *#0011# whenever you have signal it helps you to identify which band you are connected with
After that you can buy a signal repeater that support that band and bring signal to your home since its not that far distance 3km from docomo store : )

are you on 5.0.1 ?
some suggestions for you.
settings>mobile networks, there should be the preferred network type
check your access point names again, or try adding again, sending a message to provider would probably give u the settings. :fingers-crossed:

iridaki said:
Ah I see.
I think I know what's going on.
The N910L supports the following frequencies: GSM 900/1800/1900, UMTS 850/1900/2100 and LTE Band 1, 3, 5, 7.
Docomo don't use GSM at all, instead they use UMTS 800/1700/2100 and LTE Band 1, 9, 19, 21, 28.
Basically your phone is not designed for the Japanese market, as it only supports two of the eight frequencies used by Docomo. The reason you had signal and still have around their store is probably because there's a tower that supports the UMTS 2100 or LTE Band 1 frequency. So you either moved recently or perhaps you didn't but one of the nearby towers was switched to a different, unsupported by your phone, frequency.
Click to expand...
Click to collapse
Ive not moved recently, and my childrens phones on the same sim plan and provider works perfectly. Also no matter where I go I never get signal - except right outside doccomo shop. BUT phone worked perfectly for 7 weeks before with great signal. Something has changed regarding my phone I think. Maybe my phone got changed to different settings over the air or something.
Thank you

googy_anas said:
In network settings , there should be a submenu where you can change it. You can also directly access it with long press on data connection icon in notification drawer
Envoyé de mon SM-N910C en utilisant Tapatalk
Click to expand...
Click to collapse
When I long press I get a tick box for allowing a Data network and the Just access point settings tab. No tab for choosing 2g 3g 4g LTE etc.
Thanks

azizski said:
try this code in the dialer *#0011# whenever you have signal it helps you to identify which band you are connected with
After that you can buy a signal repeater that support that band and bring signal to your home since its not that far distance 3km from docomo store : )
Click to expand...
Click to collapse
Hello Azizski, I checked *#0011# and the top one says DLCH 10736 ULCH 9786
the other seemingly relavent lines say
MM Cause 0 IDLE/DISCONNECTED-SERVICE
GMM Cause 0 DEREGISTERED/LIMIT
RCC DISCONN RSSI/TX 89/0
Whatever that all means.
Thank you for your help.

are you on 5.0.1 ?
some suggestions for you.
settings>mobile networks, there should be the preferred network type
check your access point names again, or try adding again, sending a message to provider would probably give u the settings. :fingers-crossed:

devilxvergil said:
are you on 5.0.1 ?
some suggestions for you.
settings>mobile networks, there should be the preferred network type
check your access point names again, or try adding again, sending a message to provider would probably give u the settings. :fingers-crossed:
Click to expand...
Click to collapse
Hi, I've input the settings maybe a hundred times now - I can do it from memory almost with my eyes shut . The settings are the same as what workedfor 7 weeks. The guy at the counter of my provider input them too - they dont work anymore.. There is only one access point that used to work.
iijmio
iijmio.jp
[email protected]
iij
chap or pap
Thanks for your help. I stlll feel the problem is something software or update based, maybe the modem has been changed somehow. Or another setting deep inside the phone.
Does flashing an update also flash a new modem and baseband?

devilxvergil said:
are you on 5.0.1 ?
some suggestions for you.
settings>mobile networks, there should be the preferred network type
check your access point names again, or try adding again, sending a message to provider would probably give u the settings. :fingers-crossed:
Click to expand...
Click to collapse
Hi Yup Im on 501. Was on the phone to them 3 times last week - last time for 2 hours - nothing they say seems to work.
Thank you for your help though.

Why you dont try flashing kitkat or first lolipop u get whit odin?
Install from Play Store ☆Phone info☆Samsung and check your CSC code than go to sammmobil and download right FW...flash whit ODIN and u will be see...
*Oh sorry u allready tried that... Maybe to flash different modem?

kazbluesk1 said:
my childrens phones on the same sim plan and provider works perfectly.
Click to expand...
Click to collapse
And, just to clarify, your children have Note 4 phones, with the exact same model number (N910L)?

Jovan1997 said:
Why you dont try flashing kitkat or first lolipop u get whit odin?
Install from Play Store ☆Phone info☆Samsung and check your CSC code than go to sammmobil and download right FW...flash whit ODIN and u will be see...
*Oh sorry u allready tried that... Maybe to flash different modem?
Click to expand...
Click to collapse
Hi, Yes, I want to try to flash a new modem but Im not sure about the procedure and exactly which files I need. I have tried to flash a few modems via ZOdin but I keep getting a nand write fail. Im a noob at this and am obviously doing something wrong. If you can tell me exactly how to do it I'd be very greatful.
Ian

iridaki said:
And, just to clarify, your children have Note 4 phones, with the exact same model number (N910L)?
Click to expand...
Click to collapse
Hi Iridaki,
Nope they have 2 old iphone 4 s' using the same data sim as me. (iijmio ((basically docomo)) ). Sorry about not being clear about that.

Need to root for 3G/4G lock.. nonsense?

Dear Members!
I recently switched from Lumia 630 DS to this nice phone, P8 Lite.
Sadly, in 2016, there are phones with inability to maintain data+call over 2G.
So, when i make/receive calls, network gone cause phone falls back to 2G.
Sure, no problem, let's set it to 3G/4G... Wait! You can't...
It's a shame that you need to unlock bootloader, and root your phone,
just to hack settings.db to switch 3G/4G only..
Anyone here, can tell me what stores these options, and where?
I would like to modify original rom, to let choose 3G/4G,
To help others not to go through this long procedure to lock phone only 3G/4G.
Because if we can have a stock rom with ability to choose 3G/4G,
Users just can install that rom without need of BL unlock + root.
I achieved this using adb:
settings put system preferred_network_mode 12

mthqwork said:
Dear Members!
I recently switched from Lumia 630 DS to this nice phone, P8 Lite.
Sadly, in 2016, there are phones with inability to maintain data+call over 2G.
So, when i make/receive calls, network gone cause phone falls back to 2G.
Sure, no problem, let's set it to 3G/4G... Wait! You can't...
It's a shame that you need to unlock bootloader, and root your phone,
just to hack settings.db to switch 3G/4G only..
Anyone here, can tell me what stores these options, and where?
I would like to modify original rom, to let choose 3G/4G,
To help others not to go through this long procedure to lock phone only 3G/4G.
Because if we can have a stock rom with ability to choose 3G/4G,
Users just can install that rom without need of BL unlock + root.
I achieved this using adb:
settings put system preferred_network_mode 12
Click to expand...
Click to collapse
I think is not possible without root
i tried using the secret code *#*#2846579#*#* but you cannot change the preferred network type
so i solved this problem with xposed but you must be rooted ...

xander33 said:
I think is not possible without root
i tried using the secret code *#*#2846579#*#* but you cannot change the preferred network type
so i solved this problem with xposed but you must be rooted ...
Click to expand...
Click to collapse
I have tried Xposed, but it disables the theming, which is ugly.
And to be honest, dont want to have a framwork just to achieve a simple trick.
I know that this way we need root. But i meant a modified stock rom, which includes the option 3G/4G.
The settings app says that selected mode is 3G/4G but when I open selection it shows:
Automatic 4G/3G/2G
Automatic 3G/2G
3G Only
2G Only
Obviously none of them selected, because it's not in the list that i set.
I need to add somehow the Automatic 3G/4G to the list.
Then just need to flash modified stock rom, and root if you want, but not must.

mthqwork said:
I have tried Xposed, but it disables the theming, which is ugly.
And to be honest, dont want to have a framwork just to achieve a simple trick.
I know that this way we need root. But i meant a modified stock rom, which includes the option 3G/4G.
The settings app says that selected mode is 3G/4G but when I open selection it shows:
Automatic 4G/3G/2G
Automatic 3G/2G
3G Only
2G Only
Obviously none of them selected, because it's not in the list that i set.
I need to add somehow the Automatic 3G/4G to the list.
Then just need to flash modified stock rom, and root if you want, but not must.
Click to expand...
Click to collapse
there is a new dedicated version of xposed that work without disable theme engine
i posted the link here
http://forum.xda-developers.com/p8lite/general/xposed-version-theme-engine-active-t3394115
with intelli 3g you could use 3g/4g only option

xander33 said:
I think is not possible without root
i tried using the secret code *#*#2846579#*#* but you cannot change the preferred network type
so i solved this problem with xposed but you must be rooted ...
Click to expand...
Click to collapse
xander33 said:
there is a new dedicated version of xposed that work without disable theme engine
i posted the link here
http://forum.xda-developers.com/p8lite/general/xposed-version-theme-engine-active-t3394115
with intelli 3g you could use 3g/4g only option
Click to expand...
Click to collapse
Thanks, i will try it. I used the Intelli3G with theme-disabled xposed, but I was so disappointed with themes, so immediately restored the nand backup
But the main goal is still to have Auto 3G/4G incorporated in stock rom. Maybe better to write to Huawei to include in stock?

mthqwork said:
Thanks, i will try it. I used the Intelli3G with theme-disabled xposed, but I was so disappointed with themes, so immediately restored the nand backup
But the main goal is still to have Auto 3G/4G incorporated in stock rom. Maybe better to write to Huawei to include in stock?
Click to expand...
Click to collapse
you have right but i dont think that they take care about that

xander33 said:
you have right but i dont think that they take care about that
Click to expand...
Click to collapse
The shame is that 2013 device Lumia 630 does the dual data+call mode over 2G. I think all WP do this, but new android devices still not.
So the 3G/4G lock is just a half-solution to the problem with (most of) android devices don't or don't want to support 2G voice+data. And the annoying is that, even if you are in good 3G coverage, it drops to 2G in seconds after call established. So no matter what is falls back to 2G. My engineer friend said its by design to keep 3G cells free. Shame. Maybe this will be solved if 2G cells shutdown
I am curious that it's a radio chip inability or just android design fail? Because i think the os disables data channel.
But don't know if hardware supports it or not. Here in Hungary, my network supports it from the very first time, i know from an engineer.
But the first (and only) phone saw that works this way is the Lumia.

mthqwork said:
The shame is that 2013 device Lumia 630 does the dual data+call mode over 2G. I think all WP do this, but new android devices still not.
So the 3G/4G lock is just a half-solution to the problem with (most of) android devices don't or don't want to support 2G voice+data.
I am curious that it's a radio chip inability or just android design fail? Because i think the os disables data channel.
But don't know if hardware supports it or not. Here in Hungary, my network supports it from the very first time, i know from an engineer.
But the first (and only) phone saw that works this way is the Lumia.
Click to expand...
Click to collapse
well my carrier (H3G) have only 3g/4g no 2g
i think that is a OS problem but I haven't the knowlegde to be sure, it's just an opinion

xander33 said:
well my carrier (H3G) have only 3g/4g no 2g
i think that is a OS problem but I haven't the knowlegde to be sure, it's just an opinion
Click to expand...
Click to collapse
I guess that too. Maybe some more experienced ppl will let us know.
Just installed Xposed 85.1 looks fine. Thank You :good:

N950N Olympics edition having trouble on TMobile

Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!

I dont know how your carrier handles VOLTE, but my carrier requested me to go in person and there they activated the service

hgeek23 said:
Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!
Click to expand...
Click to collapse
Hey There,
I'm glad to stumble upon an actual user of an Olympic edition.
Would you mind installing Samsung PhoneInfo app from playstore and sharing your current CSC Code, and your Device Model number - which I assume is N950N ?
I'm just looking for a way to obtain the bootanimation and the theme of it...

hgeek23 said:
Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!
Click to expand...
Click to collapse
Short answer, sell it and get the USA version.
Sent from my SM-N950U using Tapatalk

Don't want to sell something that has such sentimental value to me

Product code SM-N950NZWZKTC
CSC code KTC

Additionally it doesn't seem to have the ability to have conference calls?

If you enabled all the switches through IMS setting & VoLTE still doesn't work, you'll need T-mobile CSC to get it working. Aside from the IMS settings, there are some VoLTE related settings in cscfeatures.xml. I have a N950F with modified T Mobile CSC, VoLTE, Wifi calling are working fine, I also have the VoLTE quick setting tile. But I'm rooted & is how I installed it
You'll need T Mobile CSC for wfi calling.
---------- Post added at 05:06 PM ---------- Previous post was at 04:56 PM ----------
Limeybastard said:
Short answer, sell it and get the USA version.
Sent from my SM-N950U using Tapatalk
Click to expand...
Click to collapse
Heck no, I say root it, I'd never trade it for a US Snapdragon but that's just me. Can easily get VoLTE working along with many more features.

shouren04 said:
If you enabled all the switches through IMS setting & VoLTE still doesn't work, you'll need T-mobile CSC to get it working. Aside from the IMS settings, there are some VoLTE related settings in cscfeatures.xml. I have a N950F with modified T Mobile CSC, VoLTE, Wifi calling are working fine, I also have the VoLTE quick setting tile. But I'm rooted & is how I installed it
You'll need T Mobile CSC for wfi calling.
Click to expand...
Click to collapse
Will the Tmobile CSC work on this particular device? Tmobile csc i thought would not work on the 950n's as its not the same hardware?
where can i get the csc?

hgeek23 said:
Will the Tmobile CSC work on this particular device? Tmobile csc i thought would not work on the 950n's as its not the same hardware?
where can i get the csc?
Click to expand...
Click to collapse
That I have no idea, I have no idea if flashing just the CSC file works between different model/chipset phones. I assume not. I rooted my phone in 2 days so I have no experience flashing official CSC files.
I'm using a modified version of TEKHD's S8 T-Mobile transformation pack. It's an early version of the following mod that I further modified for myself.
[MOD] Exynos T-Mobile CSC Wifi Calling, VoLTE etc for N950N / N950F
The person who made it has a N & specifically made it to get VoLTE & WIFI calling to work on N models. I'm using an earlier version cause it works fine on F models but still had issues on N models. To summarize that thread, he finally got it working fine for N models with nothing additional needed. But you need TWRP & root to install it.

Limeybastard said:
Short answer, sell it and get the USA version.
Sent from my SM-N950U using Tapatalk
Click to expand...
Click to collapse
shouren04 said:
That I have no idea, I have no idea if flashing just the CSC file works between different model/chipset phones. I assume not. I rooted my phone in 2 days so I have no experience flashing official CSC files.
I'm using a modified version of TEKHD's S8 T-Mobile transformation pack. It's an early version of the following mod that I further modified for myself.
[MOD] Exynos T-Mobile CSC Wifi Calling, VoLTE etc for N950N / N950F
The person who made it has a N & specifically made it to get VoLTE & WIFI calling to work on N models. I'm using an earlier version cause it works fine on F models but still had issues on N models. To summarize that thread, he finally got it working fine for N models with nothing additional needed. But you need TWRP & root to install it.
Click to expand...
Click to collapse
I need to flash a new kernel? Firmware? Will this replace the Olympics bootscreen?

@hgeek23 Did you see my PM ? Thanks

hgeek23 said:
I need to flash a new kernel? Firmware? Will this replace the Olympics bootscreen?
Click to expand...
Click to collapse
It won't replace the Olympics boot screen but it will trip Knox & may void warranty (not sure what warranty laws are from the original COO, some countries don't void warranty for tripping Knox). But if you are in the US, you can't claim warranty on the phone in the US anyway.
You'd have to install TWRP & root your phone to install the mod I linked. But being how rare that phone is, I wouldn't do it unless you find a copy of the stock Olympics FW for that phone in case anything happens. Seems like others have been looking for it but can't find it yet. Other say it's just a theme that can be installed but if it has a different boot screen then I doubt it's just a theme for the theme store.

hgeek23 said:
Hi all,
Received an Olympic edition note 8 (n950n) at the Olympics. We were supplied originally with a KT sim and even in the settings there's a "service provider" menu of KT related items. I have gotten back to North America and popped in my TMobile sim. It took resetting all network settings until I finally got LTE working on it.
However, volte doesn't seem to work at all. I even downloaded the shortcut master and went to ims settings to enable volte switch but still switches to 3g when I make a call. Similarly it can't even find hd calling. The option in shortcut master "hd voice" shortcut says "not found" when I try to launch it.
Ideally it seems as though I just need a different CSC but I don't want to void any warranty on this phone, especially given that I'm sure Samsung USA won't touch it since it's an international model.
Are the n950n's just lacking in many features?
Thanks!
Click to expand...
Click to collapse
Maybe you've got the rare paralympic edition of Note8 which isn't capable of it? (I know, tastefully offensive. I'll be going to hell for that joke)
On a serious note, since it's the N950N which is similar to the N950F afaik, you're better off asking TMobile directly about any connectivity issues.
Usually like others have previously mentioned, should be CSC related but f.e. (if I'm not mistaken) due to the OMC folder/ structure, nearly all country CSC are included. Just the CSC features aren't accessible unless you replace the specific CSC with a modified one from S8/S8+.
If TMobile can't fix it or help you out, you're choice would be to root, double check with a N950F/N950N user if they have volte or (someone has to jump in here to verify) try flashing -if available- factory binaries for specifically USA.

I doubt T-Mobile will help or can even do anything being an international phone. My F on T-Mobile USA worked perfectly fine. You don't need IMEI provisioning with T-Mobile USA like you do with some carriers like AT&T. My speeds were great out the box, better than my T-Mobile Note 5, just didn't have VoLTE & Wifi calling until I enabled them w/ root. We now have 2 more Note 8s in the household, U T-Mobile variants. Speeds are pretty much exactly the same as my F.

shouren04 said:
That I have no idea, I have no idea if flashing just the CSC file works between different model/chipset phones. I assume not. I rooted my phone in 2 days so I have no experience flashing official CSC files.
I'm using a modified version of TEKHD's S8 T-Mobile transformation pack. It's an early version of the following mod that I further modified for myself.
[MOD] Exynos T-Mobile CSC Wifi Calling, VoLTE etc for N950N / N950F
The person who made it has a N & specifically made it to get VoLTE & WIFI calling to work on N models. I'm using an earlier version cause it works fine on F models but still had issues on N models. To summarize that thread, he finally got it working fine for N models with nothing additional needed. But you need TWRP & root to install it.
Click to expand...
Click to collapse
Hey there, I thought I recognized the name. Remember me? One of the first to test and rip open the F model to try and figure out the LTE issue / carrier aggregation issue.
I've read through some pages over on the OEM Lock thread ... so to conclude, they figured out the issue with the OEM lock disappearing, but did they ever figure out the carrier aggregation for using F/N model 100% on T-Mobile??
I know people with the F and N models that are still suffering from carrier aggregation and like this Olympic Edition model, which is just a N model with a cool back white Olympic cover. Those who plan to use this on T-Mobile may face the LTE connectivity (carrier aggregation) issue..
For those in really good reception areas may not seem like they have an issue, but that is because they are connected to a really strong (single) signal/frequency, which makes it seem like everything is fine...
Would you be able to provide links to any progress regarding this issue? Has it been solved? If so, it's likely buried in the pages somewhere in the other threads....:highfive:

iunlock said:
Hey there, I thought I recognized the name. Remember me? One of the first to test and rip open the F model to try and figure out the LTE issue / carrier aggregation issue.
I've read through some pages over on the OEM Lock thread ... so to conclude, they figured out the issue with the OEM lock disappearing, but did they ever figure out the carrier aggregation for using F/N model 100% on T-Mobile??
I know people with the F and N models that are still suffering from carrier aggregation and like this Olympic Edition model, which is just a N model with a cool back white Olympic cover. Those who plan to use this on T-Mobile may face the LTE connectivity (carrier aggregation) issue..
For those in really good reception areas may not seem like they have an issue, but that is because they are connected to a really strong (single) signal/frequency, which makes it seem like everything is fine...
Would you be able to provide links to any progress regarding this issue? Has it been solved? If so, it's likely buried in the pages somewhere in the other threads....:highfive:
Click to expand...
Click to collapse
Yes I remember you. I may not be the best guy to answer your questions but I'll share what I remember.
If you remember, I was just about the only guy in those threads that didn't experience any of the issues you guys did. I'm still using an early version of KT's TMO zip which was basically a slightly modified version of tekhd's S8 zip. The versions to follow is when they started changing more & had issues as it was later found out that the TMB_keystrings.dat from N950U was the cause. Once they replaced that file the issues were reported to have been resolved. I think the current version is like 9m or something I like, I'm using 3a & always have been, never tried any later versions & is probably why I never experienced those issues.
At home my reception is not very good nor are speeds, I get 20-40mbps depending on the time of day. This was the same before I used the zip. My CA combos were different than what the zip gave me but I still had the combos that get's used the most in my area. Around town in good areas I can get 80-135mbps. I stopped checking as I put the subject to rest a while ago.
A few months ago my parents both got Tmobile N950Us. I compared my F with the TMO zip & speeds are pretty much the same, sometimes my F is slightly faster, sometimes the U, but not a big difference so I consider that other factors & call them the same. I've even tried a speed test at a local T-mobile store & the speed was like 6mbps (that area I know doesn't have good coverage) on a U where mine was getting just under 20. Still I'm not saying my F is any better but since I was able to test actual T-Mobile U variants, I don't believe my phone to have any issues with speeds & CA in my area.

Yes the Olympics edition is simply an N with a theme applied and physical cover with the logo on it. the bootscreen is an olympics logo etc.
Merging calls doesnt seem possible, i dont know why. LTE frequently drops on Tmobile now and just goes to 3g or no service at all.
Volte not working either.

I had a similar situation. I bought my phone (N950F) from abroad. Although the phone was in the compatible devices list of my carrier company, they told me that VoLTE could not be used on phones taken from abroad (silly reason). VoLTE enable is carried out by sending a request SMS to the carrier. I put my SIM card into a friend's phone, and sent the request through it. My carrier enabled my SIM card. I put it back to my phone and voila! I have been using VoLTE since then without any problem.

Just wanted to post a final kind of update and that is that the above referenced CSC for Tmobile worked well.