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Hey Guys,
I need some help with my G2x. Everything was working absolutely fine with it. I updated, modified the phone etc everything working great. One night, I'm sitting here and I pick up my phone to use it. I notice it says invalid sim card and I have no signal. I figured either T-Mobile had a problem or maybe I just needed to hard reboot. I did that, nothing. It finds the network for t-mobile, but it can not connect. No matter what I do, INVALID SIM CARD. I restore it, INVALID SIM CARD, NVFLASH restore to factory, INVALID SIM CARD. It was working completely fine and then one night it just crapped out and it's been over a month. I can't figure out what to do. I went to a t-mobile dealer today and got a new SIM card, it says the same thing! INVALID SIM INVALID SIM INVALID SIM.
I don't really know what to do at this point, I've tried everything.
I searched all over the forum, heard suggestions from call t-mobile to restore etc but nothing is working here.
My last ditch effort is to try unlocking the phone. I'm waiting for the unlock code now, but I'm really hoping that someone with more experience might know what I'm dealing with here and hopefully lend a helping hand in terms of some advice.
It'd be greatly appreciated. I'm fairly saavy when it comes to recovering bricked phones, etc. but I've never had an APN issue where the APN is good to go and the SIM works in other phones, etc. but not mine including when a t-mobile dealer actually links a brand new sim to the phone and it still isn't working, etc. No clue what's going on but I'm hoping unlocking the phone will help. Any help would be really appreciated.
Sorry to hear that happened. Did u try a different sim?
Sent from my LG-P999 using xda premium
yes no sim card is currently working on it.
I just unlocked the phone, it does not fix the problem.
It continues to say invalid sim card. :-(
---------- Post added at 04:52 PM ---------- Previous post was at 04:19 PM ----------
In the settings menu when I go to APN's it has the t-mobile apn and everything is correct. I go to network operators and ATT, T-MOBILE US and T-MOBILE GSM come up, but when I try to connect to any one of the three it says "unable to connect to this network at this time. Please try again later" I am mystified. I've tried everything I can think of.
---------- Post added at 05:01 PM ---------- Previous post was at 04:52 PM ----------
Another point to make.
When I put in the sim card, even though it's NOT registering to the network and every card says INVALID SIM CARD, I received a notification telling me that I had a voicemail......... when I put my sim card into another phone and called my vm, I did indeed have a v/m.... so I don't believe the phone is shot, I believe something is just very wrong and I don't understand what it is.
You need a new similar, this happened to me, I rooted my g2x and it said invalid similar, if u show T-Mobile they will give u a free one
Sent from my LG-P999 using XDA App
cwa542 said:
You need a new similar, this happened to me, I rooted my g2x and it said invalid similar, if u show T-Mobile they will give u a free one
Sent from my LG-P999 using XDA App
Click to expand...
Click to collapse
I went to a t-mobile dealer today and got a new sim card. It STILL says invalid sim card.
Go to T-mobile or call get a new Sim card stay until it works are do a phone exchange but stay until they fix the problem your phones is still under factory warranty of they can't fix the problem they violate the contract
Sent from my LG-P999 using xda premium
have you tried a full wipe then flashing a new rom?
simple method to try
Multiple times.
I've NVFlash recovered to stock.
I've flashed multiple different roms.
I'm wiped everything over and over, hard rebooted many times over.
Completely formatted the phone and recovered, etc.
I've tried a million things.
When I put the card in, T-mobile comes up for a second then goes away and says invalid sim card. I went to a t-mobile dealer, they gave me another sim card and it's the same thing. I really just don't know what to do. I feel like I've tried everything.
Do you have another T-Mobile phone, or any unlocked GSM phone, you can use to test the sim card? At least that way you can determine if the problem is with your phone or the actual sim card.
Sounds like an issue with your phone, but its always good to be sure.
phburks said:
Do you have another T-Mobile phone, or any unlocked GSM phone, you can use to test the sim card? At least that way you can determine if the problem is with your phone or the actual sim card.
Sounds like an issue with your phone, but its always good to be sure.
Click to expand...
Click to collapse
Sim works fine in my tablet. both data and voice/etc. it's definitely the phone. I am lost.
deadly1 said:
Sim works fine in my tablet. both data and voice/etc. it's definitely the phone. I am lost.
Click to expand...
Click to collapse
if thats the case, then whats your warranty status?
they can replace the phone for you if the SIM card slot is defective
Unroot make , update to 2.3 if u haven't already and re root
Sent from my LG-P999 using XDA App
Sounds like your baseband code got corrupted or your baseband chip went bad. Restore it and do a warranty swap if you can. No way to reflash baseband at this time on the G2X.
jboxer said:
Sounds like your baseband code got corrupted or your baseband chip went bad. Restore it and do a warranty swap if you can. No way to reflash baseband at this time on the G2X.
Click to expand...
Click to collapse
he might still be able to re flash the baseband via this method, especially if he still has the old one http://forum.xda-developers.com/showthread.php?t=1180331
wyldkard said:
he might still be able to re flash the baseband via this method, especially if he still has the old one http://forum.xda-developers.com/showthread.php?t=1180331
Click to expand...
Click to collapse
Yes, if that works it will flash the new baseband and return his phone to GB stock. Worth a try.
hey guys... no warranty. It's fix it or I'm screwed, unfortunately.
It sounds like you guys identified the problem with the baseband corruption..
I'm going to try and do all methods suggested in the thread including unrooting and updating to gingerbread, rerooting... and also flashing the baseband...
I'll be back with some results!
Thanks for all of the suggestions, I'm obviously hoping I can resolve this!
Thanks again
I got "invalid sim" only when trying to start wifi calling and booting to CWM and wiping the cache and rebooting solved the problem.
If nothing works for you get a new sim card from t-mobile.
T-Mobile also had some funny setting in my account and after several hours with tech support and providing a sim card (phone number) of friend of mine they fixed it. As in ..my phone worked fine with my friends sim card but not with mine.
[HELP] I am having the same issue. I have a T-Mobile G2x/P999. I have had at least 10 roms without issues on the device. I flashed to CM7.0.1.0 stable and bam I have an Invalid sim card, I have tried to unroot, stock flash, NVFlash to stock, trying a different rom altogether with no avail. I have tried NV BAT Flash with NVFLash and nothing. I have found many post about CM7 after of course I flashed mine. My previous sim was new in April of this year, but I went to T-Mo and get a new one today with nothing. I to have wiped, licked, and spanked my phone with no results... CAN ANYONE HELP?? Can't even send it back in because I cant unroot it... HELP!!!!!
firemedic0911 said:
[HELP] I am having the same issue. I have a T-Mobile G2x/P999. I have had at least 10 roms without issues on the device. I flashed to CM7.0.1.0 stable and bam I have an Invalid sim card, I have tried to unroot, stock flash, NVFlash to stock, trying a different rom altogether with no avail. I have tried NV BAT Flash with NVFLash and nothing. I have found many post about CM7 after of course I flashed mine. My previous sim was new in April of this year, but I went to T-Mo and get a new one today with nothing. I to have wiped, licked, and spanked my phone with no results... CAN ANYONE HELP?? Can't even send it back in because I cant unroot it... HELP!!!!!
Click to expand...
Click to collapse
Yikes! Thats taking phone sex to a whole new level ... Did you try removing the battery and sim card, waiting a few seconds and then reinserting and rebooting?
Sent from my LG-P999 using XDA App
Yes I have done everything possible... Before the CM7.0.1.0 rom was installed, my baseband was from March 2001, now it reads July 2011. I have tried to switch back to the prevoius Baseband, but it wont let me either.
Loaded cm10 20120927 last night and all ran good. no data drops or anything. i ram cyanogenmod backup this morning and on reboot no imei or anything. good that i backup it up to my sdcard and to dropbox.
if one of the MODS would like to move this to the development forum thats ok. i know that if wouldn't matter because cm10 probably didnt cause the imei loss.
Edit: I took a chance and rebooted again hoping that it was just something sbout the reboot and imei, phone number etc etc is back. Good for me, but not sure I have read of this happening. Anyway, all is good now.
ef-civic said:
Loaded cm10 20120927 last night and all ran good. no data drops or anything. i ram cyanogenmod backup this morning and on reboot no imei or anything. good that i backup it up to my sdcard and to dropbox.
if one of the MODS would like to move this to the development forum thats ok. i know that if wouldn't matter because cm10 probably didnt cause the imei loss.
Edit: I took a chance and rebooted again hoping that it was just something sbout the reboot and imei, phone number etc etc is back. Good for me, but not sure I have read of this happening. Anyway, all is good now.
Click to expand...
Click to collapse
Did you not back up your IMEI via ADB?
stargate125645 said:
Did you not back up your IMEI via ADB?
Click to expand...
Click to collapse
yes I did
I'm not sure why you made this thread though if you had your imei backed up and it came back after a reboot. I lost mine 3-4 times and it came back each time after a reboot, I never had to recover from my backup yet though.
Installed JB ROM on S3 Verizon - not connecting to network
Any suggestion on how to fix this this issue.
I install a JB rom last night, but it seemed like it deleted the IMEI number off the phone. Through the forums, I was able to restore ( I didn't not back Up IMEI - i know) the IMEI number back on the cell phone.
However, the phone is unable to register to the Verizon network. I have an inside Verizon guy, who helped associate, on his end, my IMEI number to my account/ sim card. still not connecting. has any one else got this problem, and able to resolve?
I should be getting a new Sim Card tonight, hoping that might resolve the issue, if not, I will call Verizon Warranty to get a new phone.
PS. on verizonwireless, it shows that Samsung S3 is associated with my SIM/ telephone number.
thanks for any suggestion or help in advance.
jaimanny said:
Any suggestion on how to fix this this issue.
I install a JB rom last night, but it seemed like it deleted the IMEI number off the phone. Through the forums, I was able to restore ( I didn't not back Up IMEI - i know) the IMEI number back on the cell phone.
However, the phone is unable to register to the Verizon network. I have an inside Verizon guy, who helped associate, on his end, my IMEI number to my account/ sim card. still not connecting. has any one else got this problem, and able to resolve?
I should be getting a new Sim Card tonight, hoping that might resolve the issue, if not, I will call Verizon Warranty to get a new phone.
PS. on verizonwireless, it shows that Samsung S3 is associated with my SIM/ telephone number.
thanks for any suggestion or help in advance.
Click to expand...
Click to collapse
There's a link in my signature for "IMEI Repair" click that and you can fix the problem
jaimanny said:
Any suggestion on how to fix this this issue.
I install a JB rom last night, but it seemed like it deleted the IMEI number off the phone. Through the forums, I was able to restore ( I didn't not back Up IMEI - i know) the IMEI number back on the cell phone.
However, the phone is unable to register to the Verizon network. I have an inside Verizon guy, who helped associate, on his end, my IMEI number to my account/ sim card. still not connecting. has any one else got this problem, and able to resolve?
I should be getting a new Sim Card tonight, hoping that might resolve the issue, if not, I will call Verizon Warranty to get a new phone.
PS. on verizonwireless, it shows that Samsung S3 is associated with my SIM/ telephone number.
thanks for any suggestion or help in advance.
Click to expand...
Click to collapse
Reprovision on the stock rom.
con247 said:
Reprovision on the stock rom.
Click to expand...
Click to collapse
This! Dialer code *2767*3855#
droidstyle said:
This! Dialer code *2767*3855#
Click to expand...
Click to collapse
yup, that worked. I thought I did that earlier with my verizon guy. Maybe it took time to sync up..
anyway thank you for your help.
thanks con247, and droidstyle.
ok so here's the deal folks. I've been trying to fix this problem on my ATT Skyrocke since the 21st. I had flashed a copy of the Liquid Smooth ROM with all data working. Bear in mind, this S2 is net unlocked and APN settings are changeable with my sim card in, and everything is set to Straight Talk APN settings. When LS ROM was installed, everything worked fine, til this fateful day of the 21st where everything just stopped... No network, no data, no nothing. Every once in a while my network shows up and allows me to make short phone calls ranging from 45 seconds to 10 minutes, and sms/mms are even more widely spread on being able to receive. After going through my EFS folder, it seems that the phone is missing a critical file named nv_data. I have everything else in the EFS folder that should be there, at least from my experience, but my data still will not come back up. SOMEONE PLEASE TELL ME THIS IS FIXABLE!!!!!!!!!!!!! I'm losing my mind, considering this is my only work phone for my business, and as of yet, i don't have enough income from this business to buy a new phone.
EDIT*****
Before I forget, which I already did once, I have tried the following steps to fix this:
1: Bought a new sim card tray through ebay - no change
2: Flashed back to stock ROM - (multiple times) no change
3: Flashed multiple older roms - no change
4: Ran the EFSFix off of this: http://forum.xda-developers.com/showthread.php?t=1611796
Currently looking at performing a dark side wipe to install a new custom rom, but not sure if this will work yet or not.
420tuprophit13 said:
ok so here's the deal folks. I've been trying to fix this problem on my ATT Skyrocke since the 21st. I had flashed a copy of the Liquid Smooth ROM with all data working. Bear in mind, this S2 is net unlocked and APN settings are changeable with my sim card in, and everything is set to Straight Talk APN settings. When LS ROM was installed, everything worked fine, til this fateful day of the 21st where everything just stopped... No network, no data, no nothing. Every once in a while my network shows up and allows me to make short phone calls ranging from 45 seconds to 10 minutes, and sms/mms are even more widely spread on being able to receive. After going through my EFS folder, it seems that the phone is missing a critical file named nv_data. I have everything else in the EFS folder that should be there, at least from my experience, but my data still will not come back up. SOMEONE PLEASE TELL ME THIS IS FIXABLE!!!!!!!!!!!!! I'm losing my mind, considering this is my only work phone for my business, and as of yet, i don't have enough income from this business to buy a new phone.
EDIT*****
Before I forget, which I already did once, I have tried the following steps to fix this:
1: Bought a new sim card tray through ebay - no change
2: Flashed back to stock ROM - (multiple times) no change
3: Flashed multiple older roms - no change
4: Ran the EFSFix off of this: http://forum.xda-developers.com/showthread.php?t=1611796
Currently looking at performing a dark side wipe to install a new custom rom, but not sure if this will work yet or not.
Click to expand...
Click to collapse
goto READ THIS B4 POSTING | THE MOST Common Questions Answered HERE read/do q)25.d and borrow someones active att sim card, if after that phone still doesnt work right then its some kind of hw failure
hey vin. actually i had tried that thread and instructions for such already. although i went ahead and did it again in hopes that maybe i just did it wrong, but no change.
Here's a little update:
The baseband is known, running on I727UCMC1 baseband, but the IMEI number shows up as 0/00. I spent the entire night searching the forums here and over at androidforums.com and ran through google. There's no listing of the baseband being known, but the imei number being corrupt. Maybe I'm just using the wrong keywords... IDK but I do know this is really strange. I've never ran into this issue before.
So anyone know why the Baseband would be known, but the IMEI corrupt?
420tuprophit13 said:
hey vin. actually i had tried that thread and instructions for such already. although i went ahead and did it again in hopes that maybe i just did it wrong, but no change.
Here's a little update:
The baseband is known, running on I727UCMC1 baseband, but the IMEI number shows up as 0/00. I spent the entire night searching the forums here and over at androidforums.com and ran through google. There's no listing of the baseband being known, but the imei number being corrupt. Maybe I'm just using the wrong keywords... IDK but I do know this is really strange. I've never ran into this issue before.
So anyone know why the Baseband would be known, but the IMEI corrupt?
Click to expand...
Click to collapse
baseband aka radio has nothing todo w/the imei.
as to why imei got corrupted, idk why it happened and i dont know if theres a fix for that
edit: a bad radio might corrupt the efs folder though not sure if thats what happened to u
it seems you might have a corrupted efs folder
search for corrupted imei
try this http://forum.xda-developers.com/showthread.php?t=1611796
I performed method 1 here http://forum.xda-developers.com/showthread.php?t=1232107&nocache=1 to sim unlock my phone so I can use my optus sim (it was originally vodafone). The problem is I've tried many different roms and every time I boot I have to manually select the network while my APN settings won't save so I can't access mobile data at all. It's actually the same problem MrSoulSOng posted in a thread:
"Does anyone have an idea why after flashing this rom, it won't detect my sim card? Also because there is no sim, the is no option for mobile networks in the settings.
I came from Bruce's old rom, with a full wipe prior to flashing. I've had to revert to the nandroid backup of my previous rom in the meantime.
Oh and I've searched heaps and just can't find anything regarding the issue.
Sorry to quote myself, but I've managed to get the Rom to find my sim by searching for networks. But it never 'sticks' after boot?
So my problem is now the APN saving issue. I've tried so much. I've tried editing it, but it doesn't save. Next I tried editing the 'apns-config.xml' file yet it did nothing either. Lastly I tried the 'APN Backup and Restore' method.. Converting it to a system app etc.. But no joy!
Could it be to do with the radio I'm using? I'm using the 11.76A.3504.00P_11.24A.3504.31_M... With the RIL 4.0.0037HMQ [2]
Any help would be greatly appreciated!"
I tried to unlock it again using method 2 but I'm getting the same issue. The latest rom I flashed (unofficial cm12) in fact won't even make outgoing calls but incoming works.
>> Partial solution was found; still looking for the root of the problem. <<
I recently decided to take the plunge and root my OnePlus One and install sultanXDA's CM 13 ROM on it. It was all going well until I booted up into the ROM and discovered that I couldn't get any mobile data. Everything else was working, calling, texting, wifi, but mobile data seemed to refuse to work. Since I initially flashed sultan's ROM with TWRP 3.0.0, I suspected it was a problem with my modem. Though unable to install TWRP 2.8.6.0 to re-flash everything, I did still flash a new modem via ADB. This didn't help.
I have tried many things to fix this. I rebooted/reflashed. I flashed different ROMs. I tried flashing on TWRP 2.8.6.1, though I believe that one has the same modem problem as the versions after it. As mentioned above I tried flashing a modem over ADB. I took out and re inserted my SIM card. In the end, I tried this guide here to restore my phone to it's original state. The guide flashes the stock versions of everything via ADB. Though it did return me to unrooted COS 12.1, it was not able to resolve my data problem.
After the total reset, all I can think that could be causing it is a hardware problem or that it is caused by something not reset in the 100% restore above.
If any of y'all can help my solve this, or at least offer insight, I would be very grateful.
Preemptive Edit I Guess: This thread was just suggested to me while writing this. I'm going to try the solution here and report back. It's OnePlus' reset to stock method. I'm not expecting much after my first 100% reset attempt, but we'll see.
EDIT: Ok, so the solution above fixed my problem... (edit again: turned out to only be a partial solution. See below.)
I would feel really dumb right now if it weren't for the fact that I slaved over this problem for a good ~8 hours before writing this post. Anyways, I'm not sure how to delete this post or mark it as solved. Sorry for the trouble y'all.
Never delete this post !!
I have the same problem, and I spent much more time to find a solution.
I will try this and will update.
Is it a clean stock rom?
Edit:
Didn't help for me ..
Still the same problem, No mobile internet connection.
Thx anyway.
Yeah, actually I was too hasty is identifying this as the solution. For me, the stock reset brought me back to CM 11 which didn't have a problem with mobile data. But if I try to flash a later ROM or update via OTA, the problem returns. I'm still trying to figure out what is causing it. The only information I can find points to it being a modem problem or APN problem, but I'm sure I have sufficiently checked both of those already.
Either way, I'll keep looking. If I find something I'll return here with it. Good luck
arkasa said:
Yeah, actually I was too hasty is identifying this as the solution. For me, the stock reset brought me back to CM 11 which didn't have a problem with mobile data. But if I try to flash a later ROM or update via OTA, the problem returns. I'm still trying to figure out what is causing it. The only information I can find points to it being a modem problem or APN problem, but I'm sure I have sufficiently checked both of those already.
Either way, I'll keep looking. If I find something I'll return here with it. Good luck
Click to expand...
Click to collapse
Try this:
1) Download the latest fastboot images from here: http://forum.xda-developers.com/oneplus-one/general/official-cm11s-roms-ota-updates-t2906746
2) Go here and follow step #8: http://forum.xda-developers.com/oneplus-one/general/guides-bacon-timmaaas-how-to-guides-t2839471
3) Then follow step #2 to install a new recovery (you need to make sure to use TWRP 3.0.0 or the unofficial TWRP if you want to flash modems/firmwares correctly)
4) Download the latest ROM of your choice and install via your recovery
ryanmat said:
Try this:
1) Download the latest fastboot images from here: http://forum.xda-developers.com/oneplus-one/general/official-cm11s-roms-ota-updates-t2906746
2) Go here and follow step #8: http://forum.xda-developers.com/oneplus-one/general/guides-bacon-timmaaas-how-to-guides-t2839471
3) Then follow step #2 to install a new recovery (you need to make sure to use TWRP 3.0.0 or the unofficial TWRP if you want to flash modems/firmwares correctly)
4) Download the latest ROM of your choice and install via your recovery
Click to expand...
Click to collapse
I gave this a try, but booting up after step 3 I still had the same problem. If I understand this method correctly, I think it is essentially the same as the other full restore methods I tried.
I think I may have found the problem though. I was looking at OnePlus' guide to installing OxygenOS. In it they said, "do not try to flash this build through TWRP. You will most likely lose your radio and IMEI which means a trip to our customer support." At this point I have repeatedly reset/restored my modem/radio so I don't think that is the problem, but I haven't seen anything about IMEI before. The IMEI is apparently stored in the EFS partition which as far as I can tell, is not touched by any of the restore methods I have tried. I took a look at my IMEI (about phone -> status) and it turns out my IMEI SV is 00. It's supposed to be a 16 digit number. I found a guide to fixing it, but I think I will just contact OnePlus customer support first.
I'll be back later with my results.
arkasa said:
I gave this a try, but booting up after step 3 I still had the same problem. If I understand this method correctly, I think it is essentially the same as the other full restore methods I tried.
I think I may have found the problem though. I was looking at OnePlus' guide to installing OxygenOS. In it they said, "do not try to flash this build through TWRP. You will most likely lose your radio and IMEI which means a trip to our customer support." At this point I have repeatedly reset/restored my modem/radio so I don't think that is the problem, but I haven't seen anything about IMEI before. The IMEI is apparently stored in the EFS partition which as far as I can tell, is not touched by any of the restore methods I have tried. I took a look at my IMEI (about phone -> status) and it turns out my IMEI SV is 00. It's supposed to be a 16 digit number. I found a guide to fixing it, but I think I will just contact OnePlus customer support first.
I'll be back later with my results.
Click to expand...
Click to collapse
Are you flashing each of the extracted .img files from fastboot, exactly like the guide shows, or are you doing something else?
ryanmat said:
Are you flashing each of the extracted .img files from fastboot, exactly like the guide shows, or are you doing something else?
Click to expand...
Click to collapse
Yep, I ran each command listed in the guide and my phone was definitely in fastboot. Each command had a collections of "OKAY"s and ended with a "finished", which I assume means it executed as expected.
I have tried 2 different sim cards in my OPO (of two different companies, one of them as mine), and mobile data worked perfectly. Is it possible that my phone is ok and the problem happened in the sim card?
AND... my IMEI SV is 00 too. please update here if it has a connection.
Thank you !
omersa99 said:
I have tried 2 different sim cards in my OPO (of two different companies, one of them as mine), and mobile data worked perfectly. Is it possible that my phone is ok and the problem happened in the sim card?
AND... my IMEI SV is 00 too. please update here if it has a connection.
Thank you !
Click to expand...
Click to collapse
I'm not entirely sure what you're saying. Did it not work with the first SIM card, but it worked with the second?
Mobile data problem was occured (to me), after I rooted my OPO and tried to flash a new rom.
I still can't understand how it convinced my sim card, but the fact is that I tried two (to be sure) other sim cards which are not mine, and mobile data worked well.
When I returned my original sim card, problem started again.
So I am almost sure that sim card has a connection, but can't understand why. And why it happend precisely now, cause it worked well over two years.
omersa99 said:
Mobile data problem was occured (to me), after I rooted my OPO and tried to flash a new rom.
I still can't understand how it convinced my sim card, but the fact is that I tried two (to be sure) other sim cards which are not mine, and mobile data worked well.
When I returned my original sim card, problem started again.
So I am almost sure that sim card has a connection, but can't understand why. And why it happend precisely now, cause it worked well over two years.
Click to expand...
Click to collapse
sorry to intrude...but looks like mine problem too...but no connection with provider at all...and it worked 1 month normal (stock opo)..
could u flash the modem to resolve this problem?
jpvr
http://forum.xda-developers.com/one...e-plus-one-t3030545/post65841063#post65841063
Why don't you flash twrp flashable modem?
If your network is present but no data , mostly data service problem. Are you pay your mobile bills ?
Are you activate data services ?
Try this
https://www.androidfilehost.com/?w=files&flid=28032
drmuruga said:
Why don't you flash twrp flashable modem?
If your network is present but no data , mostly data service problem. Are you pay your mobile bills ?
Are you activate data services ?
Try this
https://forums.oneplus.net/threads/cos-12-master-fix-thread.307446/
Click to expand...
Click to collapse
...yes i paid my bills ..
- my network connection to provider is dead...it worked perfecly for 1 month out of the box (see original posting for detailed action i took) this thread is about lack of data connection...but also MODEM related???
- tried the brand new simcard in my old Samsung sII... works perfetly, network connection with provider, data connection and calling..so no simcard problem
Long shot. Change any APN settings from IPv6 to IPv4. That was my problem when I had text/voice but no data.
I made a post on this and then called att gophone, due to seeing other sims working on this thread, and he helped me to fix. Posting my fix here in case others with isue find this post instead of mine.
Turned off wifi.
Turned off cellular data.
Went to APN and changed the apn (ATT Go Phone) from pta to nxtgenphone.
Turned on cellular data.
Finally had H+ above he signal bar, but had an X inside the bar.
Don't know if he did anything on his end, but the X went away after a couple of minutes.
Data was working, albeit kinda slow.
Turned off phone for three minutes per ATT rep.
Rebooted.
Data still slow, but it is at least working. Thinking I need to flash different modem. Battery usage has been higher the last day or two since I flashed c7 anyways.