I've recently moved to Washington, D.C. for a summer internship as of last Friday. Ever since getting into the area, I have not been able to receive phone calls on my AT&T HTC One M9. I was curious to know if anyone else has had this issue? I am able to make phone calls, use the cellular internet (usually I have LTE service), send text messages, and anything else using the phone service, but the only time I know I get an incoming call is when my phone notifies me that I have a new voicemail message. It also doesn't matter if the phone is "awake" or not. I have had people call me when the phone screen is off and on, with the same result. I commute from Arlington, VA every day, and this issue happens regardless of where I am along my commute.
To further complicate things, if I am in phone conversation and someone calls me, Call Waiting shows up with the incoming call. So I am "able" to receive phone calls, but I do not receive them when I am not in a phone conversation.
Has anyone had a similar problem like this? I'm currently running Android Revolution 5.1 since the latest version has an issue for me where the phone restarts if I try to turn on the screen. Even then, that is not the issue because 8.1 has the same calling issue. I've talked with AT&T tech support and did everything they suggested, when I get home from work I plan on getting a new SIM card to see if that fixes things.
My gut tells me there is either something wrong with the SIM, or for some reason my out-of-state phone number (I have a central Ohio area code) has issues with the towers in the area.
I would reccommend that you try performing a manual roam, go to settings>mobile data>Network operators, let it scan for networks, select a network that is NOT your carrier then once it fails to register select your own carrier, this should update the Mobile HLR and hopefully allow you to receive calls again.
Hope this helps
shark0807 said:
I've recently moved to Washington, D.C. for a summer internship as of last Friday. Ever since getting into the area, I have not been able to receive phone calls on my AT&T HTC One M9. I was curious to know if anyone else has had this issue? I am able to make phone calls, use the cellular internet (usually I have LTE service), send text messages, and anything else using the phone service, but the only time I know I get an incoming call is when my phone notifies me that I have a new voicemail message. It also doesn't matter if the phone is "awake" or not. I have had people call me when the phone screen is off and on, with the same result. I commute from Arlington, VA every day, and this issue happens regardless of where I am along my commute.
To further complicate things, if I am in phone conversation and someone calls me, Call Waiting shows up with the incoming call. So I am "able" to receive phone calls, but I do not receive them when I am not in a phone conversation.
Has anyone had a similar problem like this? I'm currently running Android Revolution 5.1 since the latest version has an issue for me where the phone restarts if I try to turn on the screen. Even then, that is not the issue because 8.1 has the same calling issue. I've talked with AT&T tech support and did everything they suggested, when I get home from work I plan on getting a new SIM card to see if that fixes things.
My gut tells me there is either something wrong with the SIM, or for some reason my out-of-state phone number (I have a central Ohio area code) has issues with the towers in the area.
Click to expand...
Click to collapse
I had this issue last week as well. It came on out of the blue and did all the usual AT&T troubleshooting and technical support. As of Monday, though, I think I have the issue fixed. I don't know if AT&T made a network modification that spurred the issue or if I changed something on my phone. Anyway, I'm not sure exactly what step along the way actually fixed my issue, but here's what I did.
1) Go into mobile data settings and see if turning off "Enhanced 4G LTE services" helps
2) I'm not sure if ARHD has this option, but if you can set your phone disable 4g in mobile data settings, turn 4g off and see if you can receive calls...I bet you can (so that's a temporary solution)
3) Alternatively, you can dial *#*#4636#*#* which will bring you into phone settings. Go into phone information, scroll down and on preferred network type, change that from GSM/WCDMA/LTE auto to GSM or GSM Auto (again this is just a temp fix because basically you're disabling LTE which is not desirable)
If any of those work, then check this file:
system\customize\ACC\default.xml
Scroll to the "Phone" app section
Look for a line "<item type="boolean" name="voLteEnabled">false</item>"
Change that to "true"
(If ARHD is compatible with AT&T, then it's probably already set to true)
If it was set to false, reboot and see if that works (to test, you'll have to undo any changes made in steps 1,2 or 3).
I did a lot of stuff before I did any of the above and Insert Coin (the custom ROM I use) already had the voLte setting set to true so the stuff below might actually be what fixed my issue. The next steps are just not as quick to accomplish as I ran the AT&T Ruu a few times and also flashed the developer ROM.
here's everything that i did...
Ran ATT 1.32.502.31 RUU to confirm that I can receive calls on 100% stock.
Flashed stock developer RUU and I could no longer receive calls.
Flashed custom rom (Insert Coin) and I could still not receive calls.
Ran ATT RUU again and calls suddenly worked again.
Re-flashed developer RUU.
Rooted it
installed root explorer (ES Files Explorer)
navigated to system\customize\ACC\default.xml and made the change explained above
rebooted the phone and I was again able to receive calls on the developer edition
Restored Insert Coin from a backup and i was STILL able to receive calls.
After restoring IC, i checked the default.xml file and noticed that not only was voLte set to true, ALL of the voLte options (there are like 5 of them) were set to true. Then I checked the IC zip file and opened the default.xml from what i was flashing and they were all set to true in the zip file. So I think they were all set to true when I began having problems. So I'm really not sure what fixed this for me. But, like I said, that's everything I did and it's working again.
If you go 100% stock by flashing the AT&T RUU (or if you're able to restore to stock using an untouched system image from TWRP) and still can't receive calls, then get on with AT&T support and have them verify your provisioning.
Sorry if this is not very well organized, but I started having this issue like last Friday and worked on it all weekend and Monday and finally got it resolved Monday night...so needless to say...I tried a lot of different things, but what I've written above is what I believe fixed the issue.
I think the problem is that your area supports voLte but maybe the ROM doesn't. Notice when you make a call that your 4G/LTE icon changes to 4G only. Well, the same is supposed to happen when you receive a call, but for some reason, something isn't allowing the phone to switch to 4g only.
jollywhitefoot said:
I had this issue last week as well. It came on out of the blue and did all the usual AT&T troubleshooting and technical support. As of Monday, though, I think I have the issue fixed. I don't know if AT&T made a network modification that spurred the issue or if I changed something on my phone. Anyway, I'm not sure exactly what step along the way actually fixed my issue, but here's what I did.
1) Go into mobile data settings and see if turning off "Enhanced 4G LTE services" helps
2) I'm not sure if ARHD has this option, but if you can set your phone disable 4g in mobile data settings, turn 4g off and see if you can receive calls...I bet you can (so that's a temporary solution)
3) Alternatively, you can dial *#*#4636#*#* which will bring you into phone settings. Go into phone information, scroll down and on preferred network type, change that from GSM/WCDMA/LTE auto to GSM or GSM Auto (again this is just a temp fix because basically you're disabling LTE which is not desirable)
If any of those work, then check this file:
system\customize\ACC\default.xml
Scroll to the "Phone" app section
Look for a line "<item type="boolean" name="voLteEnabled">false</item>"
Change that to "true"
(If ARHD is compatible with AT&T, then it's probably already set to true)
If it was set to false, reboot and see if that works (to test, you'll have to undo any changes made in steps 1,2 or 3).
I did a lot of stuff before I did any of the above and Insert Coin (the custom ROM I use) already had the voLte setting set to true so the stuff below might actually be what fixed my issue. The next steps are just not as quick to accomplish as I ran the AT&T Ruu a few times and also flashed the developer ROM.
here's everything that i did...
Ran ATT 1.32.502.31 RUU to confirm that I can receive calls on 100% stock.
Flashed stock developer RUU and I could no longer receive calls.
Flashed custom rom (Insert Coin) and I could still not receive calls.
Ran ATT RUU again and calls suddenly worked again.
Re-flashed developer RUU.
Rooted it
installed root explorer (ES Files Explorer)
navigated to system\customize\ACC\default.xml and made the change explained above
rebooted the phone and I was again able to receive calls on the developer edition
Restored Insert Coin from a backup and i was STILL able to receive calls.
After restoring IC, i checked the default.xml file and noticed that not only was voLte set to true, ALL of the voLte options (there are like 5 of them) were set to true. Then I checked the IC zip file and opened the default.xml from what i was flashing and they were all set to true in the zip file. So I think they were all set to true when I began having problems. So I'm really not sure what fixed this for me. But, like I said, that's everything I did and it's working again.
If you go 100% stock by flashing the AT&T RUU (or if you're able to restore to stock using an untouched system image from TWRP) and still can't receive calls, then get on with AT&T support and have them verify your provisioning.
Sorry if this is not very well organized, but I started having this issue like last Friday and worked on it all weekend and Monday and finally got it resolved Monday night...so needless to say...I tried a lot of different things, but what I've written above is what I believe fixed the issue.
I think the problem is that your area supports voLte but maybe the ROM doesn't. Notice when you make a call that your 4G/LTE icon changes to 4G only. Well, the same is supposed to happen when you receive a call, but for some reason, something isn't allowing the phone to switch to 4g only.
Click to expand...
Click to collapse
Friend, you win the internet, turning off 4G and turning it back on did the trick. Thank you!
shark0807 said:
Friend, you win the internet, turning off 4G and turning it back on did the trick.
Click to expand...
Click to collapse
Nice. Glad to hear it. Where did you turn 4G off? In mobile data settings?
shark0807 said:
Thank you!
Click to expand...
Click to collapse
There's a button for that
jollywhitefoot said:
Nice. Glad to hear it. Where did you turn 4G off? In mobile data settings?
There's a button for that
Click to expand...
Click to collapse
Yes, once off of 4G I was able to receive calls again. Now That I'm home I'm trying the .xml edit to see what happens.
EDIT: Tried the .xml edit, didn't work, I will flash the RUU tonight and see what happens.
shark0807 said:
Yes, once off of 4G I was able to receive calls again. Now That I'm home I'm trying the .xml edit to see what happens.
EDIT: Tried the .xml edit, didn't work, I will flash the RUU tonight and see what happens.
Click to expand...
Click to collapse
This happened to me with my M7 on T-Mobile after they added VoLTE and I was forced to toggle off LTE whenever I wanted to use the phone and I could never make it work properly again. Fortunately for you, the M9 supports it so it could be something like tower upgrades thus toggling it off then on made it grab on to different towers...possibly. I was running ViperROM then so it was a quick toggle however it would get frustrating to have to go into settings regularly. Hope you are all fixed for good
shark0807 said:
Yes, once off of 4G I was able to receive calls again. Now That I'm home I'm trying the .xml edit to see what happens.
EDIT: Tried the .xml edit, didn't work, I will flash the RUU tonight and see what happens.
Click to expand...
Click to collapse
Was the XML switch set to false? You could try changing all of the volte switches to true. Also maybe a different custom rom...maybe arhd doesn't support volte at all.
It was, and I did as you suggested, still nothing doing. I've now been trying to use the AT&T RUU to restore everything, but I'm running into problems with that as well. I haven't seen anyone discuss it on this forum, but fastboot and htc_fastboot crash while trying to flash the RUU. First I tried with the .exe of the RUU, which doesn't give me much information except that it crashes. If I do it through command prompt (and a RUU in .zip format), the RUU sends a "pre-update", crashes with an error code FAIL90, tries to do it again, then fastboot and htc_fastboot crash on the computer.
From previous HTC phone forums, it seems like this error happens on Windows 8 and 8.1 computers, but I'm not entirely convinced why my OS in this case would be the problem.
Fastboot error on computer:
Code:
Problem signature:
Problem Event Name: APPCRASH
Application Name: fastboot.exe
Application Version: 0.0.0.0
Application Timestamp: 54bfb0a1
Fault Module Name: ntdll.dll
Fault Module Version: 6.3.9600.17736
Fault Module Timestamp: 550f42c2
Exception Code: c0000005
Exception Offset: 0004248d
OS Version: 6.3.9600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 5861
Additional Information 2: 5861822e1919d7c014bbb064c64908b2
Additional Information 3: a10f
Additional Information 4: a10ff7d2bb2516fdc753f9c34fc3b069
And for htc_fastboot:
Code:
Problem signature:
Problem Event Name: APPCRASH
Application Name: htc_fastboot.exe
Application Version: 0.0.0.0
Application Timestamp: 546e94d2
Fault Module Name: StackHash_79f3
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000005
Exception Offset: PCH_27_FROM_htc_fastboot+0x00001215
OS Version: 6.3.9600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 79f3
Additional Information 2: 79f3f37ca9651ef9bd47b0bfb55904f8
Additional Information 3: 86de
Additional Information 4: 86de0d14c4489f5d62365f6244178ece
shark0807 said:
It was, and I did as you suggested, still nothing doing. I've now been trying to use the AT&T RUU to restore everything, but I'm running into problems with that as well. I haven't seen anyone discuss it on this forum, but fastboot and htc_fastboot crash while trying to flash the RUU. First I tried with the .exe of the RUU, which doesn't give me much information except that it crashes. If I do it through command prompt (and a RUU in .zip format), the RUU sends a "pre-update", crashes with an error code FAIL90, tries to do it again, then fastboot and htc_fastboot crash on the computer.
From previous HTC phone forums, it seems like this error happens on Windows 8 and 8.1 computers, but I'm not entirely convinced why my OS in this case would be the problem.
Fastboot error on computer:
Code:
Problem signature:
Problem Event Name: APPCRASH
Application Name: fastboot.exe
Application Version: 0.0.0.0
Application Timestamp: 54bfb0a1
Fault Module Name: ntdll.dll
Fault Module Version: 6.3.9600.17736
Fault Module Timestamp: 550f42c2
Exception Code: c0000005
Exception Offset: 0004248d
OS Version: 6.3.9600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 5861
Additional Information 2: 5861822e1919d7c014bbb064c64908b2
Additional Information 3: a10f
Additional Information 4: a10ff7d2bb2516fdc753f9c34fc3b069
And for htc_fastboot:
Code:
Problem signature:
Problem Event Name: APPCRASH
Application Name: htc_fastboot.exe
Application Version: 0.0.0.0
Application Timestamp: 546e94d2
Fault Module Name: StackHash_79f3
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Code: c0000005
Exception Offset: PCH_27_FROM_htc_fastboot+0x00001215
OS Version: 6.3.9600.2.0.0.256.48
Locale ID: 1033
Additional Information 1: 79f3
Additional Information 2: 79f3f37ca9651ef9bd47b0bfb55904f8
Additional Information 3: 86de
Additional Information 4: 86de0d14c4489f5d62365f6244178ece
Click to expand...
Click to collapse
I'm on Windows 7, so I don't know about the Win 8/8.1 issues, but I've read a lot of people that have trouble using those operating systems with drivers.
Maybe try insert coin or another custom rom...I know IC supports AT&T, even thought that's the rom i was using when I started having problems.
Unfortunately I have very slow internet so it takes hours to download a ROM to test. I installed ViperROM, which I have been very happy with when I had my M7, and I can confirm that receiving calls works again. But I have the same problem I had with ARHD, that being that when the screen turns off, the phone turns off. So, the solution is "fixed" kind of, I just need to figure out why my phone is doing this standby issue, and fix that.
shark0807 said:
Unfortunately I have very slow internet so it takes hours to download a ROM to test. I installed ViperROM, which I have been very happy with when I had my M7, and I can confirm that receiving calls works again. But I have the same problem I had with ARHD, that being that when the screen turns off, the phone turns off. So, the solution is "fixed" kind of, I just need to figure out why my phone is doing this standby issue, and fix that.
Click to expand...
Click to collapse
That's because the version of Viper you're using is on the 1.40 base and you're on 1.32 firmware. Either upgrade firmware to 1.40 (requires s-off), flash a 1.32 version of Viper (if one is available...i'm sure one is), or you can try only flashing a 1.32 kernel (either the kernel found in the 1.32 viper rom, or you could try flashing Flar2's 0.3 version kernel in the Original Develpment section). I can confirm with insert coin that I'm able to run a 1.40 base rom on 1.32 base firmware by flashing a 1.32 base kernel...I can't guarantee the same will work with Viper, but it probably will. The easiest thing will be to just flash Flar's 0.3 version kernel because it's a small download. If that doesn't work, you probably should just download the entire 1.32 viper rom (or get s-off and flash the 1.40 firmware).
Actually, I forgot there's an option in Viper's aroma to install the old base kernel. Read here: http://venomroms.com/htc-one-m9/ (see the firmware requirements section)
@shark0807 your ADB and fastboot crash because they are not suitable for the M9 and buggy probably. I had such versions at the beginning of the M9 lifecycle. HTC has by now released their own version of fastboot which a.) doesn't crash anymore and b.) is capable of flashing RUU's larger than 2GB.
You can get my "Batch Tool" which includes the ARUWizard (the "RUU") from HTC as well as the updated htc_fastboot.exe and adb.exe (which I believe is just the generic Google adb.exe).
The Batch Tool comes as self-extracting rar archive and extracts to C:\Android - if you don't want to use it anymore, just delete that folder and its gone.
Batch Tool is here: http://forum.xda-developers.com/showpost.php?p=59783535&postcount=4
A procedure to have your stuff working on Windows 8/8.1:
1.) Go into Control Panel and remove everything that is or might be connected to HTC. First and foremost, HTC Sync Manager. Also every type of ADB/Fastboot drivers you see there.
2.) Download HTC Sync Manager from HERE and install it. Then remove it again (Sync Manager likes interfering with RUU flashes by blocking Fastboot and ADB for its own stupid purposes - better not have it run in the background. The drivers it installs will remain on your system anyway).
3.) Download my Batch Tool and use the "htc_fastboot.exe" instead of the generic Google fastboot.exe!
That should get you up and running. My Batch Tool additionally installs vcredist_x86_2008_SP1.exe - which is vital for a RUU to run properly. It is usually also installed by HTC Sync Manager but I have seen plenty of cases where that did not happen, so I included it into my Batch Tool setup.
Furthermore, DotNet in some version is required but usually already on most windows PC's - I haven't seen the necessity to separately install it. Just FYI.
I ended up having this problem, just tried what was said and its working so far hopefully it stays working! never had this problem before I think the volte stuff was disabled from when I tried a different rom, im staying stock rooted at&t now
jollywhitefoot said:
I think the problem is that your area supports voLte but maybe the ROM doesn't. Notice when you make a call that your 4G/LTE icon changes to 4G only. Well, the same is supposed to happen when you receive a call, but for some reason, something isn't allowing the phone to switch to 4g only.
Click to expand...
Click to collapse
I think that's the case , for now what has work for me is using GSM auto prl, drains the battery faster , don't know why .
I have call att, I have them going nuts , they don't know what it is , I also enable all of the values, for volte, in the default.XML file, but didn't work .
I'm going to try changing roms, I'm thinking maximum HD
To point out, I haven't change firmwares , the phone still has the at&t one , I've kept in order to avoid this situations , I'll try another ROM
@ZeRo2o9
Where can I get the at&t ROM rooted ??
People I had the same issue , I've call at&t and told them I can only receive call on GSM mode , while on LTE , the phone wouldn't ring at all .
So the lady explain that LTE voice is not supported on all towers , that is the reason , so she opt me out , while it becomes available. Then unchecking the option under setting and reseting the phone the calls where working again .
Thanks for this forum for the help .
All of a sudden today I cannot send SMS.
I was on a really old build of Cyanogenmod12 (April 22nd I believe) as any time I tried to update to newer Nightly builds I lost all Sprint service could not make/receive calls or texts, etc.
I decided I was pretty fed up with CM12 so I decided to go ahead and migrate to AICP. I wiped everything TWICE in recovery, loaded up AICP and it works fine, I get LTE signal, etc. However I cannot SEND SMS, I can RECEIVE SMS I just cannot SEND. I had done some data restores with Titanium and I figured that somehow some way that might be messing with things. So I did another 100% fresh install after wiping everything.... I can send/receive calls, receive SMS but I cannot SEND SMS
I am really at a loss here guys, ANY help would be greatly appreciated
*#*#4636*#*# change it to CDMA wait 30 seconds send an SMS and do *#*#4636*#*# again change it back to late/CDMA n should be ok
Sent from my SM-N910P using XDA Premium HD app
pbedard said:
*#*#4636*#*# change it to CDMA wait 30 seconds send an SMS and do *#*#4636*#*# again change it back to late/CDMA n should be ok
Sent from my SM-N910P using XDA Premium HD app
Click to expand...
Click to collapse
I stayed up all night last night working on this, let me update the thread with what I have done so far.
I was looking at some stockish ROMs and I noticed that there were warnings on some of them stating that you needed to have the Sprint OTA 5.0 update installed prior to flashing, which I actually never got. My phone came out of the box with Kit Kat and I never installed the 5.0 update, I went straight to CM12 5.0 instead. So I had a theory that there might possibly have been some sort of network data profile, etc or something out of that official 5.0 OTA that I never got that was somehow causing me problems. I decided to revert back to complete bone stock.
I wiped everything and flashed the N910PVPU1BOB7 file (MD5 = 7304e42cf0e241553d8db9e3c3eeed81) which was the official Sprint 5.0 OTA. Loaded it up, updated the PRL, Network Data Profile, etc, etc, etc.... everything works (relatively speaking...... TouchWiz sux balls of course). I have LTE signal, I can send/receive calls, I can send/receive SMS... all good.
So at this point I decided to re-wipe and flash AICP, with the emotion Kernel (latest builds on all). Load it up.... same problem as before. I have LTE signal (stronger than on the stock Sprint ROM), I can send/receive calls, I can receive SMS but I still CANNOT SEND SMS
I tried a few things at this point. I tried to manually reset the Sprint network connection on the phone by dialing ##72786#, this did not work, it returned an error "incorrect MIM code". I tried the *#*#4636*#*# that I have seen suggested in multiple places, this also did nothing, it returned an error "incorrect MIM code". I also noticed on the "mobile networks" tab, and this is true for BOTH CM12 and AICP, that it has the setting at "Global" by default and everything works with exception of sending SMS. Now when I click that tab it only has 3 options LTE, 3g, 2g.... for some reason "global" is not an option, neither is CDMA. Whenever I select LTE it automatically drops me from the Sprint network PERMANENTLY until the ROM is re-flashed there is no way to reverse this. I cannot even dial the manual programming codes "*#* etc" as it just simply says "no network service". If I try to automatically connect to the sprint network through the network operators tab it does in fact find Sprint as my provider, however if I click on Sprint to connect it processes for about 2-3 minutes and then simply returns an error of "cannot connect to the network at this time, please try again later". Again the only way to reverse this is to re-wipe and re-flash again which puts it into the unselectable "global" network setting by default where then I will have LTE signal, I can send/receive calls, and can receive SMS but not send SMS.
So that is where I am at, I stayed up all night last night wiping, flashing, and testing different things over and over. Nothing seems to work 100%, except the stock 5.0.1 OTA which is what I am on now. I really hate TouchWiz and for some reason I get a much weaker LTE signal on stock compared to either CM12 or AICP (I have no clue why this is). I am really at a loss here why everything works on the custom ROMs except for sending SMS..... willing to try almost anything to go back to a custom ROM.
Let me know if you guys have any other ideas.
Well great news I have finally resolved the SMS send issue
pbedard said:
*#*#4636*#*#
Click to expand...
Click to collapse
pbedard had tried to help me with the above post (which I appreciate, thank you), and I have seen the same advice in other threads. One slight problem though, he slightly mistyped the manual programming code it is actually *#*#4636#*#* not *#*#4636*#*# which I had tried entering ohhhhh I dont know 30 times? :silly: And it always returned an "invalid MMI code".
I had tried everything and after spending a full day on TouchWiz I was determined to fix the issue so I could go back to a custom ROM. I was even manually creating and deleting APNs, etc. Nothing would work. Right as I was about to finally give up (after literally 12hrs of researching the issue and testing fixes) I was reading the official CM 12 thread and came across the "fixes" post:
http://forum.xda-developers.com/showpost.php?p=57613217&postcount=3
Because I had tried entering the manual programming code so many times I happened to notice that the last 4 key strokes were not what I had been entering. I entered the correct programming code, boom the Phone Info menu pops right up I follow the directions and what do you know send SMS finally works .... wow what a relief, I am on the latest AICP release on the emotion Kernel and everything works like a charm.
Also by setting the phone to LTE/CDMA through the manual programming menu I have the strongest LTE signal by far, full 100% bars at all times (I live right next to a Sprint tower). I have never understood why I only got 1-2 bars on the stock ROM and 3-4bars on CM12/AICP through the default settings. Anyway thanks for help and I will list out exactly what I did to get it working.
- 100% Stock ROM
- CF Auto Root and TWRP install through Odin
- Reboot to recovery
- Wipe Dalvik cache, system , data, and cache
- Reboot to recovery
- Flash emotion kernel (optional)
- Flash latest AICP build (or custom ROM of your choice)
- Flash latest stock Gapps
- Reboot system
- Confirm Google Messenger is the default SMS app (it will already be if you flashed 5.1 stock Gapps)
- Dial *#*#4636#*#* ("Testing" menu screen will pop up, select "Phone Information")
- Scroll down to "Set preferred network type" click it and scroll up and set it to "CDMA auto (PRL)"
- Wait until 3G signal comes online (takes about 10 seconds)
- Change "preferred network type" to " LTE/CDMA auto (PRL)"
- It should take another 10 seconds for LTE signal to come online and you should be good to go to send and receive SMS ! :good: