[Q] Verizon Moto X DE on T-Mobile - LTE issues - Moto X Q&A

Well, I'm going to be doing some international travel in the next few weeks, so I picked up a T-Mobile SIM card for my Verizon Moto X Developer Edition.
The good news: The device supports T-Mobile's LTE band and registers/displays LTE.
The bad news: The LTE implementation does not seem to be at all reliable when on a GSM-based network.
1) I had a hell of a time trying to get it to accept a GSM conditional call forwarding code -- it would just immediately close the Phone app and I would temporarily lose mobile data connectivity. When I disabled LTE, it worked.
2) When I make a call while on LTE, the mobile data drops as soon as I dial. Google Voice dialing never works (app immediately closes with no mobile data) and standard dialing often just immediately closes the phone app. If I re-initiate the call after the LTE connection has dropped and before it recovers, it will sometimes work.
All of this is resolved when I force the phone into 3G-only mode. From an HSPA connection, both of the above seem to work fine.
My theory on this (maybe I'm off base) is that the handoff/fallback that's required for the phone to use a CDMA network for voice while on an LTE network is somehow still triggering -- and obviously not working for GSM.
Things I have tried:
- Setting preferred network mode to " LTE / GSM / UMTS "
- Resetting APN settings
- Clear Dalvik and Android caches
- Disabling Xposed framework
Things of note:
When I boot the phone for the first time, I receive this message:
"Sorry - This SIM card is from an unknown source"
After I acknowledge it, no problems other than the above.
Would love some pointers on what I could try to resolve this... anybody else have this scenario and had issues like this -- or gotten it working?

Related

Data problem on Int. Roaming (Brazilian carrier on Canada)

Hi everyone! I recently had a problem with my phone (hard brick on Moto G 2014) while traveling in Canada and had to buy my device locally. After some research I saw that the nexus 6 (XT1103) works fine in Brazil and with our carriers.
I set up the device just fine, upgraded to M and my SIM Card (carrier is VIVO from Brazil) is recognized normally with functional call and SMS, but no data on International Roaming. I checked the APN and looks fine, also tried to reset APNs, configure manually and even wipe data, but no luck. I try to connect and it shows the ! signal on mobile icon, and even shows that some KB of data was used in the process (currently data usage shows 0.12, and it increases every time I activate Data and Roaming).
And finally, I tried to "input the code *#*#4636#*#* on dialer > phone info > set preferred network type as LTE only" as I saw in some places and also didn't work.
----------------
What did work though, while I was writing this post, was changing "set preferred network type" as GSM only.
Is this normal? Or is there anything that I can do to use as LTE or to have this working automatically without the need of changing phone options to GSM only?
And to finish, if any brazilian see this post and had a similar experience, it would be good to know your experience with International Roaming and local data usage (especially if you use VIVO).
Thanks and sorry for long post.

Need help with VoLTE (AT&T G4 TMO SIM)

Hello!
I recently started using an AT&T LG G4 (LG H810) unlocked on T-Mobile. Initially after getting the device unlocked and making my first phone call I noticed that my phone while on call would go from LTE to no data connection at all. There is very little information but I have read that apparently it's not possible to get voice over LTE working unless it's a straight TMobile LG H811.
There wasn't any evidence to back this up and I don't see why not. I thought it was a little weird to have no data connection while on a call especially being GSM. I borrowed a friend's G4 and went into the service menu on the phone under IMS settings for the VoLTE to read it's configuration settings.
I noticed a lot of the settings were completely different than what was in my phone. So I did my best copying the settings over duplicating things like voice codec settings, port settings, timeouts etc.
After getting most of it copied over I placed a call and finally my data connection did not drop but it went from LTE to 4G. I realized while playing with the settings that "Enhanced 4G LTE services" option in the settings had been left unchecked so I checked it and called again but still when I make a call it drops from LTE to 4G.
What I'm asking essentially is for some help telling me how I can possibly get voice over LTE running or if it's impossible.
Thanks!

VOLTE on Axon M in preparation of AT&T's 3G shutdown

With AT&T shutting down it's 3G network in a few months I was wondering if anyone had been able to get AT*T's voLTE (HD voice) activated so we can still make voice calls on the network. I have the AT&T model (and am using a tracfone AT&T sim), and "search" in the settings does show an entry for "enhanced LTE services" but selecting it just takes you to the same spot as the "more" entry and there is nothing useful for voLTE. When making a voice call data drops out of LTE, down to "4G".
Using a t-mobile sim (via tracfone), defaults to voLTE, verified also by surfing during a phone call, and LTE symbol staying on the whole time.
Hmmm weird, I can get voLTE with another AT&T MVNO (unreal mobile) by default, with no issues (also tested by surfing during a call and having LTE symbol stay on). I was not aware there could/would be differences in voLTE support among MVNOs

VoLTE, WiFi calling with the upcoming 3G shutdown

Visiting the US and trying to find more information on this upcoming 3G shutdown.
From what I have learned from calling/chatting with T-mobile, AT&T, Sprint, Mint Mobile, Boost Mobile, Straight Talk and Consumer Cellular (** all this info is not guaranteed completely accurate as not all cell tech support people actually know everything - not a knock - how could they know everything about 1000 different handsets just saying)
Following anything you see below is certainly without warranty. I am not responsible for bricking your phone or turning it into a coffee maker.
Okay so enough disclaimer. Here is what I think I have learned:
For reference my phone is a V40 ThinQ LM-V405UA. It was manufactured for Sprint - bought it unlocked and refurbished.
AT&T has already shutdown 3G calling and all voice calls are now on VoLTE... but maybe not in all areas??
T-Mobile and it's MVNO's still have 3G operating and plan to shut it down in July.. ish...
Mint Mobile and Boost shows my IMEI to be compatible.
Consumer Cellular show my IMEI to NOT be compatible.
The AT&T store told me in person that I would NOT be able to enable VoLTE on my phone with the network since it was made for Sprint
AT&T Chat - escalated to Technical Support - confirmed that there was no way to enable VoLTE and that it would not function on their network.
Chatted with T-Mobile, Sprint and LG - they could not tell me any service codes or techniques to enable VoLTE. Each did kindly tell me I should check with LG, T-Mobile, Sprint...
*#*#4636#*#* brings up the Testing Menu
Under Phone Info you can switch on "VoLTE Provisioned"... (YES!! - right? ...not sure this does anything)
Below that is a toggle for "Wifi Calling Provisioned" . Mine is grey'd out in the off position
You can set the preferred network type - and mine is set currently to LTE/CDMA/UMTS auto (PRL) - not sure what that means but...
You can enter the "HiddenMenu" by dialing *#546368#*405#
I clicked all around and found only one thing
Click SVC Menu
Scroll down to VoWiFi (Ahaaa!! right??)
Click on Wi-Fi Calling Toggle and change the value to 1 - on
I rebooted and... no change.
I currently have a Mint Mobile sim (T-Mobile towers) and it currently works. Gleaning from what I read somewhere - if you truly have VoLTE activated and configure correctly you should be able to have data to load a web page DURING a call (with WiFi switched off). Mine fails to load during a call.
If you have VoWifi configured and activated correctly you should be able to make a phone call having Cell data switched off and attached to WiFi. Mine can not make a call.
My wife's Xioami phone does all of this and even has little VoLTE symbols at the top of the screen.
Hopefully all of this information helps someone else - but even better yet - hopefully someone can tell me if I will still have cell service in July when T-Mobile is shutting down their 3G service. Are there other tests I should be doing?
Also for fun - pulled my LG-V20 from the drawer and messing with it. It shows that WiFi Calling is WORKING... Battery is bloated but I think I had a successful test with it.
Anyway - that is where I am at. All tips, tricks and ANSWERS are appreciated.
I don't know if flashing it to the AT&T or open market version rom would do the trick but probably would. Note, since it's refurbished you sure it wasn't already reflashed to the open market version rom? If so it should work!
AT&T might have gotten confused by your description...
AT&T whitelisted phones:
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My understanding, and it could be outdated, but maybe not, but at&t (supposedly) checks imei, and if it's not one of their phones, there's nothing you can do to make it work. From your description, it *sounds* like they are still doing this.
For VoWifi to work, with my mint mobile sim at least, you have to go to your mint account and turn on VoWifi ability. So not only does the phone need to be capable, the sim needs to be provisioned for it. Many people overlook this part.
There are numerous indicators of VoLTE working. Many times when you bring up the dialer there's a little HD symbol on the talk button. Other times it will give you a little LTE symbol on the status bar when making a call (and it doesn't change to 3G during call), etc.
The VoLTE situation is where 'what rom are u running?' becomes very important. The lte bands that the rom is capable of need to coincide with the carrier you want to use. The 'Open US' roms have the most bands available, and is usually a great choice for T-MO (and mvno of t-mo). Even has band 71 (which is only used by t-mo).
Lastly, for those that may not be aware, after market roms, like lineage, aren't capable of VoLTE (or VoWifi), for most LG phones. that's because LG (and Sammy) both use a 'proprietary' IMS stack, which means those Vo technologies only work on their phones with their roms.
AT&T doesn't care about who's phone it was as long it's imei isn't blacklisted.
What is important is the hardware which can't be changed or the firmware which can be changed.
My guess is the issue is the former. The carrier variant phones can have slightly different hardware configurations.
Thanks gang for the notes.
I'm running stock rom. I'm not rooted nor bootloader unlocked. I'm a bit resistant as this is my daily driver phone plus there doesn't seem to be clear confirmation that cross flashing something will really result in better performance. Add to that I won't be able to reinstall whatsapp nor my banking app etc - since my home country sim and phone number (Colombia) won't receive a confirmation text until I return there in October. Tough situation.
But I've got more test results
@AsItLies - thanks for that - I was able to enable wifi calling in the Mint app. I also called consumer cellular to confirm that my sim had volte and wifi calling enabled on their end. This was all done before testing below.
I found some exciting new settings inside the hidden menu.
Dialing *#546368#*405# choosing: Field test / GPRI VoLTE+VoWifi / IMS / Slot 0
VoLTE was enabled (possibly from steps done above in my first poat?) But I was also able to enable VoWifi ViWifi and ViLTE. I enabled them all.
After making that change I dialed the Testing menu - *#*#4636#*#* - Wifi calling Provisioned and Video calling Provisioned are still greyed out in the off position. VoLTE Provisioned is still on.
Testing - I can make a call using a Consumer cellular (At&t mvno) sim. I can not get cell data during the call though- same results as with my Mint mobile (T-mobile) sim.
I was told that At&t has already shut down all 3G calling so my phone MUST be using VoLTE if the call worked?
I have read unconfirmed reports that not all 3G calling has been shut down since some of the cell towers have not been upgraded yet... so could be I just get lucky.
My wife's phone can make calls with either sim AND get cell data during the call. (so does that prove that the nearest tower must already be upgraded?)
My wife's phone has nice symbols and setting sliders for wifi calling and volte calling - all enabled
I tried running tests with airplane mode on and wifi enabled - but it wont make a call that way on my phone or the wife's phone.
So basically it seems like nothing has changed. I'm still not convinced that I will have a working phone in July ish... Any more tips on testing and verifying that are appreciated.
It's likely running on 4G VoLTE.
This is how my Note 10+ is configured, no changes were needed.
@blackhawk - My screen looks very similar.
My preferred network type is set to - GSM/WCDMA/LTE (PRL).
I am not sure if that was the default or if I fiddled with that... I am going to dink around with that and see if changing that solves my problem. But
But I did some more testing. I was away from the house at the grocery store. I dialed my phone with Mint Mobile sim in and my 4G symbol changed to 3G and the call went through. I did have data during that time - but painfully slow.
Grabbed the wife's Xiamoi phone with her Consume Cellular (AT&T Mvno sim). Dialed and the 4G symbol stayed on and she had data of a reasonable speed.
So - I am believing... not proof... that my phone is still dropping to 3G to make calls and is skating away on the still operating 3G system of T-Mobile. Evidence that I might be without calling in July.
I should test the reverse - and pop the sim out of the wife's phone and try my phone with an AT&T sim and see if I had no calling service.... but she doesn't really like when I pop open her phone in the grocery store. She puts up with a lot - but I didn't have any "geek credits" in the bank so I will have to plan for that later...
Anyway - that is the latest.
wantpizza said:
@blackhawk - My screen looks very similar.
My preferred network type is set to - GSM/WCDMA/LTE (PRL).
I am not sure if that was the default or if I fiddled with that... I am going to dink around with that and see if changing that solves my problem. But
But I did some more testing. I was away from the house at the grocery store. I dialed my phone with Mint Mobile sim in and my 4G symbol changed to 3G and the call went through. I did have data during that time - but painfully slow.
Grabbed the wife's Xiamoi phone with her Consume Cellular (AT&T Mvno sim). Dialed and the 4G symbol stayed on and she had data of a reasonable speed.
So - I am believing... not proof... that my phone is still dropping to 3G to make calls and is skating away on the still operating 3G system of T-Mobile. Evidence that I might be without calling in July.
I should test the reverse - and pop the sim out of the wife's phone and try my phone with an AT&T sim and see if I had no calling service.... but she doesn't really like when I pop open her phone in the grocery store. She puts up with a lot - but I didn't have any "geek credits" in the bank so I will have to plan for that later...
Anyway - that is the latest.
Click to expand...
Click to collapse
Set it to that setting I'm using.
Clear Sim toolkit data.
Network reset and a reset on AT&T's side too.
The APN profile should ATT Nextgenphone I believe.
@blackhawk - thanks. I have an AT&T sim to fiddle with now (Straight talk this time).
AT&T only gives me 1 bar here in my house.
It seems no matter when I chose as my Preferred network type - I get
Out of service area / Mobile network is unavailable
SIM not provisioned for voice
But I don't have a SIM toolbox on this phone. Can I get that installed without root? Can you point me in that direction. Because maybe that is what I need to do next is clear that - especially since I keep popping in random sim cards.
Thanks again
Oh - skip that - brain dead. I got the sim toolkit cleared...
On with the testing!
Did some testing again with my Mint SIM - i get 4 bars here...
Did you know that you can have the dialer, Testing menu and Sim Toolkit settings page open/split screen or background screens at the same time? Well that saves some time... By the way the HiddenMenu won't stay open as a background page... Just so you know.
So here is my testing sequence: Wifi switched off. Dial the local automated weather number and then switching to the Testing menu to watch the reported "Voice Network Type" . Record results. Enable Airplane mode. Got to Sim Toolbox and clear data. Disable Airplane mode and try a new "Voice Network Type".
Basically all of the settings for "Set preferred network type:" that include UMTS or GSM will work. But the Voice type drops to GSM or UMTS. Data drops to UMTS , HSPAP or sometimes EDGE. 5 seconds after the call ends the Phone Info page reports "Voice Network Type" and "Data Network Type" as LTE.
Any settings like LTE Only or something that doesn't include UMTS in it - the calls just fail. Actually - if the "GSM Service" inside Testing Menu/Phone Info reported "Emergency Calls Only" under "GSM Service" - then you can bet the call failed. Despite really wanting to do complete testing - I did not dial 911 to see if it would work. Just seemed wrong to potentially interrupt a real emergency - even in nowhere USA.
I found some more interesting settings inside HiddenMenu / IMS Setting / GPRI VoLTE / Slot - 0 / Roaming
Inside there are VoLTE and VoWifi - I enabled all the roaming options inside each.
But - alas no change to my tests so far.
I tested the Wife's phone on Straight talk and the Mint sim = VoLTE symbol
So that is one AT&T and one T-Mobile MVNO
Preferred Network Type: LTE/TD-SCDMA/UMTS
Worked great. Testing page showed that the voice call stayed on LTE. I enabled Wifi and tried getting it to transfer to a VoWifi call but - even with 1 bar it wouldn't go. If you have 0 bars it won't initiate a call. Probably a security thing as they don't know if you are a real subscriber??
Anyway - I think that proves?? that my phone is still not doing any VoLTE nor VoWifi calling and will likely fail or have extreme problems as the 3G network fades away.
On my N10+ the hidden menu stays open until I close it. Makes things easier.
Get the carrier advanced tech support to troubleshoot it if possible. You probably know more about than me at this point.
I can highly recommend a Note 10+ N975U1, they run great on Android 9 or 10; Android 11 and especially 12 not so much so. I have two, just bought another new one about 5 months ago.
It's a better flagship Samsung than the ones Samsung released after it in my opinion.
New factory sealed ones are available still for $800 and used ones in "excellent" condition for half of that. In a good case they will easily last 3+ years with only battery replacements. The one in my hand is 2.5 yo and looks/runs like new with zero display degradation. It's heavily used. Current OS load will be 2 yo in June, still fast and stable with minimal maintenance. Supports up to 1tb expandable storage.
Both the N975U (AT&T variant) and the N975U1 (unlocked) run seamlessly on AT&T. There's a 5G variant but it will likely eat more battery.
It's display is one of the best, maybe the best in any smartphone even today It's gorgeous with an exceptional color rendering index and white point. Being 60hz means less power consumption and better color rendering/calibration, great for vids.
It's just a snappy fast fun work horse of a phone that has excellent build quality.
Lately Samsung and Google Android have been subpar... dropping balls.
That is a smoking fast phone! I may have to give this phone up and move on. But that has issues of it's own as I will still have to keep this phone around because there are a bunch of apps I won't be able to install on a new phone because I can't get my sms confirmation until I get back to South America. But not a whole lot of other options.
Thanks again,
wantpizza said:
That is a smoking fast phone! I may have to give this phone up and move on. But that has issues of it's own as I will still have to keep this phone around because there are a bunch of apps I won't be able to install on a new phone because I can't get my sms confirmation until I get back to South America. But not a whole lot of other options.
Thanks again,
Click to expand...
Click to collapse
You're welcome.
It's a true pain migrating to a new device. I hope you get that one successfully running on VoLTE.
If you like that large of a display, it's form factor is still the best. Better display to bevel ratio too. Lighter and thinner the S22U with better SOT.
Watch this vid where the N10+ literally smokes the S22U after both rams get loaded up with apps. wtf? I'll take the dinosaur Note...

Pixel 5 gets stuck in CDMA voice network type

After realizing that call dropping connections issues with my Pixel 5 were related to some radio issue that caused my phone to be stuck in the CDMA mode, I reset the connections and all was fine again. Phone was regularly switching between LTE and 5G and the voice network type remained in LTE mode. Prior to doing the reset, no rebooting or SIM swapping would cause the phone to get "unstuck" from CDMA mode.
So, now I have been watching the SIM card status and since I work in an area of really poor coverage, my phone does go into CDMA mode sometimes while at work. What I did notice, was if the phone was in CDMA when I left my job and traveled into a normal LTE service area, the phone remained in CDMA mode until I reboot the phone, and then it goes back into the normal LTE mode.
Has anyone else noticed this behavior? What behind the scenes app or process controls the switching of the voice network type? Any insight would be appreciated.
There is a network user built into the android kernel
but In settings Network and connections
Look for prefer 5G.... That should help your issue a bit
Dont use developer option aggressive wifi over cellular handover "keep it off"
Or there may be a software update that patches it
flairepathos.info said:
There is a network user built into the android kernel
but In settings Network and connections
Look for prefer 5G.... That should help your issue a bit
Dont use developer option aggressive wifi over cellular handover "keep it off"
Or there may be a software update that patches it
Click to expand...
Click to collapse
Not seeing a developer option about aggressive wifi over cellular handover. Only seeing a "mobile data always active" whcih says "Always keep mobile data active even when wifi is active for fast network switching", which is toggled on.

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