Database Develop

Signal Constantly go out

I recently got a Milestone and so far by far the best at&t phone I've had. Don't have to change any plans. It's a Telus version, and rooted. I have the latest CM7, I flashed canada rogers band files. and the connection works. But for some reason signal keeps going out. I go from Service to No Service to Emergency Calls Only to Service. Happens in all different area's. If I use an actually AT&T phone don't have this problem.
Is thre's some setting that I'm forgetting to set?
Please help.

Much needed bump

[Q] Help! D5803 on AT&T - not receiving text messages or calls

My new xperia z3 compact (D5803) receives text messages and calls very intermittently. I'm on AT&T US, stock firmware.
- If I am using the phone (or have very recently used the phone, say within 30 seconds) then most calls and text messages come through fine (though not always).
- If I leave the phone alone for more than a few minutes, text messages or calls almost never come through - though occasionally I get a text message many hours after it was sent.
- If someone leaves a voicemail (because I didn't answer the phone, because the phone didn't ring!), I don't get a notification until I open the voicemail app and manually sync.
- I can make a phone call or send a text message with no problems (texts arrive immediately).
I don't have any of these problems when I put my SIM back into my HTC One M8.
I've tried the following to fix this:
- I went to the AT&T store and had them give me a new nano SIM. It made no difference; same issues.
- I factory reset my phone. It made no difference; same issues.
- I updated to the US version of the firmware. It made no difference; same issues.
- I put the SIM into a second, until that point unused, xperia z3. It made no difference; same issues.
Given that I have exactly the same issues after changing both the SIM and the phone, I can only think it must be some kind of compatibility issue with using AT&T on this phone - except I see that many other users of this forum are on AT&T and aren't having the same problems.
I do notice that I don't have the best signal in my house (usually 1-2 bars) so I'm wondering if maybe that could be related? As I say though, my HTC One works fine, as do all of the other AT&T phones in my house.
I think my next step will be to go and buy a T-Mobile prepaid SIM, just to see if that works, but does anyone have any thoughts or suggestions? All in all this is getting pretty frustrating, because I LOVE the phone, but right now it's unusable for me.

I would suggest reading this thread below. It should give you some tips on how to resolve your issue.
http://forum.xda-developers.com/z3-compact/help/att-apn-settings-lte-t2888644

Thank you for trying to help!
I probably should have added that link as one of the things I had already tried. To be specific, my APN settings are:
Name ATT Phone
APN phone
Proxy Not set
Port Not set
Username Not set
Password Not set
Server Not set
MMSC http: //mmsc.mobile.att.net
MMS proxy proxy.mobile.att.net
MMS port 80
MCC 310
MNC 410
Authentication Type None
APN type default,mms,supl,hipri
APN protocol IPv4
Bearer Unspecified
---------------------------------
I'm beginning to think it *must* be a signal issue, even though all the other phones in my house are fine. I have the "Advanced Signal Status" app installed, but I'm not sure what I should be looking for to see if there's anything fishy

Don't forget to download the Internet and MMS settings for your phone. You go into Settings > Wireless & Networks > More > Internet settings and download settings for Internet and MMS

Thanks again for the suggestions.
Sadly, it's still not working. I'm pretty sure I had already downloaded those settings, but I did it again anyway (seems you can just download over and over). I even reset the phone after that just to be sure, but the problem persists.

I have the same issue and I live in Sweden....

Im having the same issues. I restart the device and then come all the missed calls and missed txt messages.. i really hope theres a easy fix to this soon.

So, I switched my SIM from AT&T to T-Mobile and it fixed my issues. It seems that the either the poor AT&T reception in my house or some other strange incompatibility between the phone and AT&T was the problem.
Either way there's obviously some kind of issue with this phone - my guess is that when connectivity with the network is poor, the phone maybe times-out and gives up. Perhaps Sony will fix this with a firmware update at some point. In the mean time I would suggest that other folks having this issue maybe go to a part of town where they know reception is very good and see if the problems happen there.

So after 2 days of of testing, a new nano sim card and several phone calls to ATT I found temporary fix. Change your Network mode to WCDMA (preffered)/GSM. While this wont give you LTE it will prevent the missed phone calls and txt messages and at least you have HSPA+ . The problem is the LTE connection to ATT. The connection either drops and or prevents phone calls /texts from coming through the lower HSPA + or 2g bands... Not sure why this is. Hoping that when the Sony Store models start shipping on Nov 2nd they have the same issue and Sony will send out an update to fix the connection issue.

I'm on the US ATT network with the same problem as well. After trouble shooting I have come to agree with you. I'm really hoping Sony sends out an update.

Is this a problem on Tmobile USA with Z3 Compact also?

same issues!
I have two Z3 compacts (US version purchased direct from Sony) on my family plan with the same issues of not receiving SMS or calls when connected to wi-fi, and occasionally cannot receive SMS or calls when not connected to wi-fi either. I am always able to send texts and calls, and MMS/LTE always work (I am usually e-mailed when my phone isn't working and I get that right away). Whenever the phones aren't receiving calls, it rings once and goes to voicemail, which tips us off that the phones aren't working.
If you are also getting this problem, please get on AT&T chat and ask them to escalate/forward to their manager. We've got to get their attention. Additionally, I was told that "Okay so since the phone is unlocked our service is not guaranteed to work at full capacity, also I can not submit a case due to it is not an at&t phone. "

Yep - Same problem over here. AT&T in Northeast USA.
AT&T tried everything they could (resettings connection, etc) but again also said that it isn't guaranteed to work because it's an unlocked device.
I'm doing a system repair on the phone from the sony desktop application. Hoping it will fix, but not hopeful. Now sony says they want to have my phone in for testing. :/
I'm hoping they realize soon that this is a bug, and not a case of a broken phone.

Same problem here on cricket (AT&T) in Houston. Just disabled LTE. We'll see if that fixes it like it did for the other guy. Sony needs to get on this.
Sent from my Nexus 5

Not working MMS
Yep I have tried all of the above solutions and nothing is working. Changed APN multiple times, factory reset, switched SIM, called att, went into the store.
Like above, ATT came to the conclusion that unlocked phones are sometimes not compatible with their service and there's only so much trouble shooting they can do.
I have ATT in san francisco, and it's looking like I'm going to return the Xperia z3c. Shame it's a great phone besides the MMS issue.

aaronv20 said:
So after 2 days of of testing, a new nano sim card and several phone calls to ATT I found temporary fix. Change your Network mode to WCDMA (preffered)/GSM. While this wont give you LTE it will prevent the missed phone calls and txt messages and at least you have HSPA+ . The problem is the LTE connection to ATT. The connection either drops and or prevents phone calls /texts from coming through the lower HSPA + or 2g bands... Not sure why this is. Hoping that when the Sony Store models start shipping on Nov 2nd they have the same issue and Sony will send out an update to fix the connection issue.
Click to expand...
Click to collapse
Confirmed that this worked on my wife's z3c. She wont miss the LTE anyway since she is always near wifi and when she isn't 3G is definitely good enough. We streamed spotify for an hour today on country roads on her phone on 3G. No issues.
Sent from my Nexus 5

sorry to hear you guys are having such issues...
My z3 compact on att works flawlessly. I swapped my nano sim from a iphone 6 i was trying out straight into this.
Att did mention something about some settings they had to flip in the back end when i switched over to a nano sim from the sim i was using in my lg g3. If you guys loose all hope have a buddy with an iphone on att and use his imei and let att configure the sim for that phone then swap the sim into the z3...could work because i know it does for me

Same issues here. I have a new D5803 on Straight Talk (AT&T). I live in the mid Atlantic. It seems I don't receive calls/texts when I have 2 bars or less. Not sure about LTE vs. HSPA. I always have Wifi on so not sure if turning it off would make a difference. THIS IS A HUGE ISSUE! Hopefully a firmware update will save us. Has anyone contacted Sony?

mtilson said:
Same issues here. I have a new D5803 on Straight Talk (AT&T). I live in the mid Atlantic. It seems I don't receive calls/texts when I have 2 bars or less. Not sure about LTE vs. HSPA. I always have Wifi on so not sure if turning it off would make a difference. THIS IS A HUGE ISSUE! Hopefully a firmware update will save us. Has anyone contacted Sony?
Click to expand...
Click to collapse
Yes it does make a difference. Turn it off and everything should work.
Sent from my Nexus 5

sublimnl said:
Yes it does make a difference. Turn it off and everything should work.
Sent from my Nexus 5
Click to expand...
Click to collapse
Thanks for the info, but this isn't a viable solution! I shouldn't have to keep Wifi off to ensure I receive my calls/texts!

LTE Issue

I found similar (sort of) issues, but not really any specific to mine so I apologize if this has been asked.
I have a t-mobile N6, the new unlimited plan, and previously had a G3. With my G3 I would always have LTE coverage from work to home (35 mile range) and honestly don't ever recall dropping out of LTE coverage on my commute, which was the reason I switched to tmo. I've had my Nexus since December 19th and countless times I find myself with an HSPA signal and not LTE, I've tried rebooting when it happens in areas I know have LTE, changed APNs, and anything else I can think of but nothing seems to solve it.
Am I the only one with this issue? would it be a SIM card issue? Eventually it finds it's way back to LTE but it's annoying and happens pretty often including on the way into work this morning when I took a call that was not in HDVoice due to me not being in LTE.
This is 100% stock 64 GB version and I have done nothing to it since the day I received it.

Check your apn again, make sure it's on fast.t-mobile.com ipv6 (if it was already on ipv6 set it to see ipv4 and see what happens) ensure that it's on 4g in cell settings and not global.
Get a sim card replacement. It doesn't hurt and is usually free of charge for existing customers. If they charge you, go somewhere else or ask someone else. Or if you can wait, call t mobile customer service and they'll ship one to you.
Update to latest android version with the newest radio.
Sent from my Nexus 6 using Tapatalk

Get used to it. I think it's because of nexus phones having generic radio firmware. The radio for the tmo variant vs att or any carrier is exactly the same. The g3 radio for the tmo variant is different than the sprint our att ect.... Our radios aren't optimized for individual networks. I don't have anything to support this theory. Just my 2 ¢.

LG G5 RS988 LTE connectivity problems

Hi guys. I'm a long time xda lurker who just purchased a LG G5 RS988 because I read in the forum that I could unlock the boot loader. Soon after activation (MetroPCS) I noticed the LTE would not stay on. In a area where LTE is very strong, it makes no sense to drop to HSPA. The only time LTE works is when I restart using network select under network settings and only lasts for under a minute before dropping to HSPA. It never recovers to LTE.* I also noticed that the phone selects band 2, unlike my other MetroPCS devices which normally utilizes band 4. I called MetroPCS and have done everything I could with them and including setting my APN correctly. So I figured that I would have to flash my phone with a different ROM to ever fix it. I ran into a few major problems during my adventure to get it the boot loader unlocked. I have the BRIGHTPOINT model G5 (who ever the bleep that is) and came with 10c Android 6. I followed all the directions in the xda threads and quickly realized 10c had no fastboot mode. I tried all the button combinations and adb reboot fastboot and nothing would bring it up. It didn't even have a recovery mode. So my adventure took me to LG Bridge application for windows. I ran that and thank my lucky stars I found a update. I upgraded to 10h which switched me to Android 7. First thing I checked is if my LTE problem was resolved, which it wasn't. I took another shoot at fastboot and to my amazement I am now able to enter fastboot mode. Excited, I went to LG development site, signed up and ran the tutorial to submit my imei and device Id to receive my boot loader unlock bin/code. I submit my information and I get a rejection after submitting the form on site that says: Unfortunately, your device(United States, (BRIGHTPOINT(USA))* )does not support unlocking the bootloader.
Now what?* I can't flash or at least I personally don't know any work arounds and I can't root unless there is some method unknown to me. How do I force a new ROM into the phone without bricking it and how do I fix this LTE issue? Someone, anyone, any help is appreciated!!

OK let's try this.
Someone at least help me with a couple questions.
#1 is it possible to root without unlocking the bootloader on my LG G5.
#2 is it possible for me to flash my G5 with any other update? I am on 10h, are there any other updates I can flash?
#3 is it possible to flash any updates without unlocking the bootloader?
Thank you in advanced.

Skimpypimp said:
OK let's try this.
Someone at least help me with a couple questions.
#1 is it possible to root without unlocking the bootloader on my LG G5.
#2 is it possible for me to flash my G5 with any other update? I am on 10h, are there any other updates I can flash?
#3 is it possible to flash any updates without unlocking the bootloader?
Thank you in advanced.
Click to expand...
Click to collapse
1) You can root without unlocking bootloader only if you're lucky enough to find one of the universal rooting apps or PC programs that actually works on your device, you'll have to try them all for yourself to see if they work.
2) if there is/are stock updates you can flash them.
3) you can flash updates without unlocking bootloader if they are stock updates, but you can't apply stock updates if the device is rooted, it has to be unrooted, has to have an unmodified system partition and has to have stock recovery.
You can't flash custom recovery or custom ROMs with a locked bootloader.
Your issue probably isn't in your device software. It's more than likely an issue caused by the network itself.
Metro PCS is an MVNO(sub contracted cellular provider that uses another providers network). They have to pay the network they are under for the data that their customers use. This often means that they limit or throttle data speeds to make it more cost effective for them, so they don't lose money paying for the data that you use on the network that they are paying to use.
I DO NOT PROVIDE HELP IN PM, KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE

Thank you so much for answering all my questions. I have tried using all of LG software to flash, however I ran into problems with all of them. From unable to load some model or no detection of my phone.
Droidriven said:
Your issue probably isn't in your device software. It's more than likely an issue caused by the network itself.
Metro PCS is an MVNO(sub contracted cellular provider that uses another providers network). They have to pay the network they are under for the data that their customers use. This often means that they limit or throttle data speeds to make it more cost effective for them, so they don't lose money paying for the data that you use on the network that they are paying to use.
Click to expand...
Click to collapse
I am on a unlimited data plan and I barely use data every month because I have wifi. I used a little over one GB this month so I have no idea why they would throttle my bandwidth. I have read in this forum of other people with RS988 BRIGHTPOINT version and having the same issue. Something about the software being directed to perform a certain way on CDMA even though the phone is unlocked for both technology's. With that being said, it would still be unlikely to fix the problem by somehow flashing it to a non BRIGHTPOINT stock?
How do I flash when none of LG software works for me and what can I flash it to that's not BRIGHTPOINT?

Skimpypimp said:
Thank you so much for answering all my questions. I have tried using all of LG software to flash, however I ran into problems with all of them. From unable to load some model or no detection of my phone.
I am on a unlimited data plan and I barely use data every month because I have wifi. I used a little over one GB this month so I have no idea why they would throttle my bandwidth. I have read in this forum of other people with RS988 BRIGHTPOINT version and having the same issue. Something about the software being directed to perform a certain way on CDMA even though the phone is unlocked for both technology's. With that being said, it would still be unlikely to fix the problem by somehow flashing it to a non BRIGHTPOINT stock?
How do I flash when none of LG software works for me and what can I flash it to that's not BRIGHTPOINT?
Click to expand...
Click to collapse
There are a few factor that could be the cause of these kinds of speeds even though you haven't exceeded high speed data limits.
1) They are trying to keep bandwidth at the bare minimum level for high speed data to keep their cost down but aren't doing a very good job of it and actually dropping too low.
2) Maybe it is due to the total amount of data being used by all of their users at a given time and they drop the speed to control how much total data they are having to pay the network they are under for.
3) Total area coverage and proximity to towers along with the amount of traffic on those proximal towers. In other words, maybe the load on the system in your area is very high and they are trying to limit it for cost purposes.
As for what you can flash for whatever reason, I haven't a clue. I'm just trying to potentially explain the cause of your data speed issues.
I deal with the same issues on my cellular network which is also a MVNO network under Verizon towers, I have unlimited plan also and I don't exceed my high speed limit, the thing is, it has done this with 3 different devices on this same network. This tells me that software is not to blame, the cellular provider is the cause. I live in a 4G area with plenty of coverage but I've still had my 3G device and my 4G devices frequently drop to 1x speeds for no reason and do it for extended periods more than just a few minutes.
And my wife's 4G device frequently drops to HSPA+ and HSPA speeds, even 1x sometimes, that device is also on the same network that mine are. See a connection yet? That kind of pattern can't be a device/software related issue.
I DO NOT PROVIDE HELP IN PM, KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE

Thanks again for your quick response to my last reply.
I don't think they would just pick my phone to do this to. I have a family plan and my fiance has had three phones since we been together and none had this issue. I have personally had two other phones and they didn't have this problem. With all the past and current phones, LTE coverage is really high. We live right next to a tower.
I believe you when you say some networks can and will do that to people. But all the evidence to the problem points to the phone because I doubt they would single out my phone. I am actually using the same sim card from my LG G4 (the phone before I upgraded to G5) which the G4 worked perfect.
Droidriven said:
There are a few factor that could be the cause of these kinds of speeds even though you haven't exceeded high speed data limits.
1) They are trying to keep bandwidth at the bare minimum level for high speed data to keep their cost down but aren't doing a very good job of it and actually dropping too low.
2) Maybe it is due to the total amount of data being used by all of their users at a given time and they drop the speed to control how much total data they are having to pay the network they are under for.
3) Total area coverage and proximity to towers along with the amount of traffic on those proximal towers. In other words, maybe the load on the system in your area is very high and they are trying to limit it for cost purposes.
As for what you can flash for whatever reason, I haven't a clue. I'm just trying to potentially explain the cause of your data speed issues.
I deal with the same issues on my cellular network which is also a MVNO network under Verizon towers, I have unlimited plan also and I don't exceed my high speed limit, the thing is, it has done this with 3 different devices on this same network. This tells me that software is not to blame, the cellular provider is the cause. I live in a 4G area with plenty of coverage but I've still had my 3G device and my 4G devices frequently drop to 1x speeds for no reason and do it for extended periods more than just a few minutes.
And my wife's 4G device frequently drops to HSPA+ and HSPA speeds, even 1x sometimes, that device is also on the same network that mine are. See a connection yet? That kind of pattern can't be a device/software related issue.
I DO NOT PROVIDE HELP IN PM, KEEP IT IN THE THREADS WHERE EVERYONE CAN SHARE
Click to expand...
Click to collapse

So far, so solved.
I have had the exact same issue you described @Skimpypimp . Last year I switched onto a family member's at&t plan and my Nexus 6 would not stay on LTE, despite the APN being correct. Through contacting att reps I discerned that they really just wanted me to buy a phone from them (their IMEI #). I called them and gave them my "new" IMEI, and suddenly I had pure uncut LTE.
Fast forward through me being scammed on Craigslist by buying a rent-a-center LG G5 a few months later which I finally just got working this month. Now I'm having the same issue as you. LTE for a minute, then back to hspa. I just tried switching it to LTE/CDMA mode and I'm using the att broadband APN (what is used on tablets) instead of the nxtgenphone APN. It's been 10 minutes so far and still LTE. IDK if you're able to take similar actions on your network, but that worked for me.
Good luck!!
Ninja edit: I am using RS988 stock rooted with unlocked bootloader. Android 7.0
Skimpypimp said:
Hi guys. I'm a long time xda lurker who just purchased a LG G5 RS988 because I read in the forum that I could unlock the boot loader. Soon after activation (MetroPCS) I noticed the LTE would not stay on. In a area where LTE is very strong, it makes no sense to drop to HSPA. The only time LTE works is when I restart using network select under network settings and only lasts for under a minute before dropping to HSPA. It never recovers to LTE.* I also noticed that the phone selects band 2, unlike my other MetroPCS devices which normally utilizes band 4. I called MetroPCS and have done everything I could with them and including setting my APN correctly. So I figured that I would have to flash my phone with a different ROM to ever fix it. I ran into a few major problems during my adventure to get it the boot loader unlocked. I have the BRIGHTPOINT model G5 (who ever the bleep that is) and came with 10c Android 6. I followed all the directions in the xda threads and quickly realized 10c had no fastboot mode. I tried all the button combinations and adb reboot fastboot and nothing would bring it up. It didn't even have a recovery mode. So my adventure took me to LG Bridge application for windows. I ran that and thank my lucky stars I found a update. I upgraded to 10h which switched me to Android 7. First thing I checked is if my LTE problem was resolved, which it wasn't. I took another shoot at fastboot and to my amazement I am now able to enter fastboot mode. Excited, I went to LG development site, signed up and ran the tutorial to submit my imei and device Id to receive my boot loader unlock bin/code. I submit my information and I get a rejection after submitting the form on site that says: Unfortunately, your device(United States, (BRIGHTPOINT(USA))* )does not support unlocking the bootloader.
Now what?* I can't flash or at least I personally don't know any work arounds and I can't root unless there is some method unknown to me. How do I force a new ROM into the phone without bricking it and how do I fix this LTE issue? Someone, anyone, any help is appreciated!!
Click to expand...
Click to collapse

Unlocking LTE bands on a US Cellular LM-V405UA that is now on Google Fi?

TL;DR: USCC -> AT&T -> Google Fi -- Any way to get 4G/LTE on these carriers?
Hey all,
I haven't been very involved in the rooting/flashing/whatever scene since the Gingerbread-KitKat days, so my apologies for what might be a noob question, or if it even is the right question to ask.
A bit over a year ago, I switched from US Cellular to AT&T and brought my V40 with me. Despite some IMEI issues (was only 14 digits instead of 15, which messed with some online forms), I eventually managed to get it transferred. However, there was one big issue: I was only getting 3G/HSPA+ service. I imagine this would've been a deal breaker for most, but since I only really use my phone data for music streaming and Google Maps when I'm driving, it wasn't that big of a deal for me.
Then, recently, I switched to Google Fi to save money. I knew that the V40 didn't support the fancy carrier-switching stuff, but I didn't care as long as I had some sort of service. The same problem still persists, however: I only have 3G/HSPA+ service.
When I briefly looked into this last year, I remember seeing something about flashing some firmware that'd unlock the non-USCC LTE bands, but I'm not sure if this was valid (could be misremembering). Would flashing some sort of firmware on my phone allow me to have 4G again, and if so, what would I flash? The generic US unlocked firmware?
Also, not sure if this matters, but GSMArena and LG's own website both seem to state that the US Cellular's V40 model is the LM-V405UA0, but my model number according to Settings is LM-V405UA (no zero at the end). My phone worked fine on US Cellular, so I'm not sure what difference there is between the two models, if any.
edit:
Messing around with my phone settings, I was actually able to force a 4G LTE signal from T-Mobile (Google Fi's primary network iirc) under Settings > Network & internet > Mobile networks > System select and flipping the Network mode option between "Global" and "LTE/GSM/UMTS". Going from the latter to the former will switch me to 4G/LTE from 3G/HSPA+, but going in the opposite direction keeps me on 4G. To revert, I have to go further into the GSM/UMTS settings and select "UMTS/HSPA/HSPA+ only" in the Network submode option.
Both the 3G and 4G options had about the same (slow) network speed of 2mbps down, and according to Signal Spy, the LTE was probably using band 4 (it had a question mark beside it, implying it wasn't very certain). I don't know if it's a band issue or a location issue, but since I'm on WiFi most of the time nowadays, I'm not that pressed about it... maybe I'll back things up and flash the US Unlocked firmware as a weekend project sometime.