Database Info

lost imei after reboot with cm10 20120927

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.

[Q] Galaxy Nexus radio/modem failure, baseband version : unknown

Hi,
I'm new to this forum.
I got a new Samsung Galaxy Nexus (unlocked GSM-i9250) mobile thruoug Google Store and got it to India.
I did an OTA upgrade from ICE Stock 4.0.4 to stock JB 4.1.1. My next upgrade to 4.1.2 failed, though detected by system failed.
So I used the phone for about 2 days and one day after charging, there was no radio service. WIFI works. Tried another SIM
and operator but in vain.
As all my efforts of factory reset, reboot etc failed, I thought of reflashing the latest images.
So I downloaded the latest images from Google site, unlocked the bootloader, followed different threads
and tried updating to 4.1.2. System now boots to 4.1.2 and WIFI works, but no GSM service still.
In the phone settings
Basebad version : unknown
Network : Unknown
IEMI : unknown
Service state : Out of service/Radio off (keeps toggling every 4-5 sec)
So I tried going back to 4.0.4 and system boots back to 4.0.4, but no GSM service
No idea what is happening. Two of us bought at the same time and got the same to India. For my friend, the OTA updates
to 4.1.1 and 4.1.2 went through fine.
I saw similar issues reported but not able to figure out how finally they solved it.
Any suggestions/help is appreciated.
Thanks in advance
Sanu

sanu.mathews said:
Hi,
I'm new to this forum.
I got a new Samsung Galaxy Nexus (unlocked GSM-i9250) mobile thruoug Google Store and got it to India.
I did an OTA upgrade from ICE Stock 4.0.4 to stock JB 4.1.1. My next upgrade to 4.1.2 failed, though detected by system failed.
So I used the phone for about 2 days and one day after charging, there was no radio service. WIFI works. Tried another SIM
and operator but in vain.
As all my efforts of factory reset, reboot etc failed, I thought of reflashing the latest images.
So I downloaded the latest images from Google site, unlocked the bootloader, followed different threads
and tried updating to 4.1.2. System now boots to 4.1.2 and WIFI works, but no GSM service still.
In the phone settings
Basebad version : unknown
Network : Unknown
IEMI : unknown
Service state : Out of service/Radio off (keeps toggling every 4-5 sec)
So I tried going back to 4.0.4 and system boots back to 4.0.4, but no GSM service
No idea what is happening. Two of us bought at the same time and got the same to India. For my friend, the OTA updates
to 4.1.1 and 4.1.2 went through fine.
I saw similar issues reported but not able to figure out how finally they solved it.
Any suggestions/help is appreciated.
Thanks in advance
Sanu
Click to expand...
Click to collapse
I had a similar experience with my previous Nexus S device. The phone would start up perfectly fine but it wouldn't catch reception. I think I flashed the wrong radio.img file (there are a lot of Nexus S variants).
I would try the following steps:
- Flash CWM recovery
- Flash a custom ROM (you can use "Mounts and Storage" in CWM recovery to gain temporary access to your internal storage - you will need to do this to copy your ROM file there)
- If you like it, just stick to the custom ROM.
If you insist on going back to the stock ROM, there are threads here that guide you to go back to stock completely. Even if you go back to a previous ICS ROM (specific to your phone), you should start receiving OTA updates normally.
Best of luck!

Thanks for the reply.
I'm almost sure the radio image is fine. I downloaded the images from
Google Nexus developers site for "takju" for Galaxy Nexus "maguro" matching with my phone.
I flashed matching ROM and radio images from Google site. Tried both ICS 4.0.4 & JB 4.1.2
I'll try custom ROMs if nothing works out. I'm going to try this first time, so need to chk the threads first. This is my first Andriod phone and already ran into trouble after just 2 days of use, that too without any manual flashing. Only OTA happened before the issue.
Could the h/w have gone bad ?
In fastboot mode, the radio version is displayed correctly, but not after phone is up and running.
If the h/w has become faulty, I still expect the "Baseband version" in "About Phone" to be correct.
Is this assumption correct ? If it is s/w issue, I'm relived and I can try some custom image. So I'm hoping its only a s/w glitch.
Thanks a lot

you flashed the wrong rom on your phone and corrupted its efs partition. If you have a backup (why should you if you didn't even know that it was that to fail your phone's radio..) you could proceed and restore it. If you don't it's a big mess and you might have to go to a repair service.
Anyway you could still try and flash the original ROM for your phone and see if it fixes the problem. If not there are tools on the web (search the forums) that could try and restore your partition even if you don't have a backup.
If you succeed in restoring your phone don't EVER forget to backup you /efs partition

Thanks.
I tried flashing as the phone radio just stopped working after I charged the phone one day morning.
Let me follow your suggestions. I didn't know about efs partition. may be its messed up
What is puzzling me is, how can the factory images from google be wrong.
clait said:
you flashed the wrong rom on your phone and corrupted its efs partition. If you have a backup (why should you if you didn't even know that it was that to fail your phone's radio..) you could proceed and restore it. If you don't it's a big mess and you might have to go to a repair service.
Anyway you could still try and flash the original ROM for your phone and see if it fixes the problem. If not there are tools on the web (search the forums) that could try and restore your partition even if you don't have a backup.
If you succeed in restoring your phone don't EVER forget to backup you /efs partition
Click to expand...
Click to collapse

sanu.mathews said:
Thanks.
I tried flashing as the phone radio just stopped working after I charged the phone one day morning.
Let me follow your suggestions. I didn't know about efs partition. may be its messed up
What is puzzling me is, how can the factory images from google be wrong.
Click to expand...
Click to collapse
It's not the factory images to be wrong but the fact that if the /efs partition is really corrupted the stock images don't contain the info necessary to flash that partition as well.
In fact it may become corrupted after a wrong flashing but a new, correct, flash won't restore it. The only way back is the /efs backup.
What if you type *#06#? Does it show you an IMEI number or what?

*#06# shows "OK"
clait said:
It's not the factory images to be wrong but the fact that if the /efs partition is really corrupted the stock images don't contain the info necessary to flash that partition as well.
In fact it may become corrupted after a wrong flashing but a new, correct, flash won't restore it. The only way back is the /efs backup.
What if you type *#06#? Does it show you an IMEI number or what?
Click to expand...
Click to collapse

sanu.mathews said:
*#06# shows "OK"
Click to expand...
Click to collapse
Between the blue line and the OK it should show the sixteen digit long IMEI number. the fact that it isn't shown simplifies the diagnosis. I'm 100% sure you've got your /efs partition corrupted.
Please do a forum search on how to restore it.
Sent from my GT-I9300 using Tapatalk 2

Thanks a lot.
This eliminates so much un-wanted time waste/means no need to try various steps.
Can I get efs dump from another Galaxy nexus and flash it on mine after rooting ?
I'm under the impression that IEMI number etc should be in OTP and that can't get corrupted but efs may have some meta data regarding the same
clait said:
Between the blue line and the OK it should show the sixteen digit long IMEI number. the fact that it isn't shown simplifies the diagnosis. I'm 100% sure you've got your /efs partition corrupted.
Please do a forum search on how to restore it.
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse

sanu.mathews said:
Can I get efs dump from another Galaxy nexus and flash it on mine after rooting ?
Click to expand...
Click to collapse
No can do, the IMEI is a per device unique number.
Check this thread and do some forum search: http://forum.xda-developers.com/showthread.php?t=1689525
You're not the only one that lost the IMEI so chances are likely to you to resolve your issue!

If I copy the IMEI number from the box or my working phone, will it work ?
What I want to know is, is it only coming from EFS or if IMEI is changed will be there be some signature that will fail etc
I have used fastboot but not sure about rooting, so need to read that before trying Rooting
In India, Samsung won't repair my phone as I got it from US.
Another worry is, let IMEI number be wrong and let there be no network, but atleast "Baseband version : Unknown" shdn't come in the phone, correct ? Coud there be any issue with radio image partition itself ?
clait said:
No can do, the IMEI is a per device unique number.
Check this thread and do some forum search: http://forum.xda-developers.com/showthread.php?t=1689525
You're not the only one that lost the IMEI so chances are likely to you to resolve your issue!
Click to expand...
Click to collapse

sanu.mathews said:
If I copy the IMEI number from the box or my working phone, will it work ?
What I want to know is, is it only coming from EFS or if IMEI is changed will be there be some signature that will fail etc
I have used fastboot but not sure about rooting, so need to read that before trying Rooting
In India, Samsung won't repair my phone as I got it from US.
Another worry is, let IMEI number be wrong and let there be no network, but atleast "Baseband version : Unknown" shdn't come in the phone, correct ? Coud there be any issue with radio image partition itself ?
Click to expand...
Click to collapse
Mate - I too am from India, and I too got the exact same problem, and I too tried all you did - all this about a month back. I have reconciled myself to the fact that its a hardware issue. Since samsung centers in India won't do any repairs, I'm afraid we're both stuck with really expensive music players.
My sympathies.

Fixed by sending in for warranty
Just an update...I was having all of these symptoms...unknown IMEI, Baseband, etc...basically gave me an expensive media player for a few months while waiting for a fix on XDA. After no update I decided to call up Samsung and after talking to 3 different technicians, I was able to send it in. Just a note for anyone about to do the same, they will try very hard to blame it on the carrier/SIM card, so save yourself some trouble and just say you already went to the physical store of your carrier (calling isn't enough)and they couldn't get it working. Once you get past that, they will email you a printable 2-day UPS shipping label so you can ship it to them for free. It took 2 weeks from the time I called to having a working phone back in my hands.
This was their fix:
Problem found:
NO PCS SERVICE
Solution:
REPLACED PBA
After a quick search I found that the PBA is the motherboard, so it's definitely a hardware issue. Hope you guys are still under warranty because I've heard this is ~$200 to fix otherwise.
Good luck.

Dropping data and no calls/texts. Advice please.

Just in case this post gets moved, I want to identify my device as the Verizon Samsung Galaxy S3 (i535).
To give a little background on my issue, I have an issue with the device. When I first got it back in July, first thing I did was root the device. Naturally, since it was a new device, I was working with experimental methods... a couple weeks ago I thought to download CyanogenMod 10.1 (nightly build) to flash it with 4.2 and rid myself of the persistent OTA update that as we all know could not effectively install because of the measures I took to root. So, I boot into recovery and flash my custom rom. BAM! As it turns out, I did not have an unlocked bootloader and my phone was now teetering on the verge of being a $600 paperweight. I got that dumb yellow triangle saying unofficial firmware detected or some nonsense like that... Anyway, I look around the internet and decided that I was going to revert back to a stock rom using Odin, and then proceed to unlock my bootloader and root the device (I followed method 3 here) I used some touch recovery console that I have never heard of before (backups incompatible with ClockworkMod recovery) and something must have failed because my back up would not flash. I took the hit on losing most everything and reflashed successfully the custom rom mentioned earlier.
After about a week, I noticed the device began to drop data. 4G would just stop at random parts of the day, and I would have to disable and enable the data to get it to reconnect. At this point I was still able to make and receive phone calls and texts. After about 3 days of this, I concluded it was more than likely a bug in the custom rom, and that I could not live with it... so I redid the a fore mentioned tutorial and left the phone as a stock/unlocked/rooted device. The data issue continued, but with a twist. I was now unable to make or receive phone calls or texts. No matter what I did, I could not do anything and the 4G would only stay connected for a matter 5 minutes or so. When I logged into my vzw account, it identified my device as an unknown non-verizon device. Customer service walked me through various soft/hard reset techniques and nothing worked. They also suggested I try a new SIM card, which failed to work.
So, I turn to the bright minds of the android community. I have already decided not to invoke the Verizon warranty offered, where the result is they take my malfunctioning phone in flawless cosmetic condition and replace it with a "like-new" phone in working condition, because I think it's garbage that a warranty would give out used crap (should fix or replace). I have not contacted Samsung customer support yet because I wanted to see what my options were. I've already attempted flashing different radios and nothing seem to make any difference. If I have to, I will revert it back to stock again and invoke Samsung's warranty program, but I would much rather keep the phone. As it sits, I am stuck with my Motorola Droid Razr Maxx, and that just doesn't cut it.
So I ask, is there anything that can be done? Anyone know of a fix for my situation? I saw something about this in my quest for an answer and I don't know if my situation is a fit for this fix. If anyone has any knowledge of my issue and a work around for it, it would be greatly appreciated. I am at my whits end.

It sounds like you've done your homework on your problem.. The only thing in your post I didn't see was your sim card.. Maybe pulling it wait 2min restart. Shut down and insert,, or maybe a reprovision of the sim may be in order..
Ahaaaa....!!!

If your IMEI is intact, I would say to flash to ICS and reprovision the phone as suggested above. If it is not, you need to restore it with that backup that you made some time ago.
If it were me, I would reprovision, that is easy to do and I honestly think that it will work for you. If that works for you, reroot and restore your backup for TW ROM and you will be fine.

HHF2 said:
If your IMEI is intact, I would say to flash to ICS and reprovision the phone as suggested above. If it is not, you need to restore it with that backup that you made some time ago.
If it were me, I would reprovision, that is easy to do and I honestly think that it will work for you. If that works for you, reroot and restore your backup for TW ROM and you will be fine.
Click to expand...
Click to collapse
Well that's just it... I don't know anything about the IMEI and how to determine if that is the issue. If by reprovision you mean reflash back to stock, that is it's current state, and that did not resolve the issue.
As for the other comment in regards to the SIM card... I have already attempted that method, and it did not work. Also, a new SIM card was also tried, and had no success.

mkruluts said:
Well that's just it... I don't know anything about the IMEI and how to determine if that is the issue. If by reprovision you mean reflash back to stock, that is it's current state, and that did not resolve the issue.
As for the other comment in regards to the SIM card... I have already attempted that method, and it did not work. Also, a new SIM card was also tried, and had no success.
Click to expand...
Click to collapse
Google reprovision, it is a number combination that you enter on the keypad that resets your phone. I had a similar problem that you are having and that fixed our for me. You also need to know that when you do this, it will erase all of your information on the phone. It will be just like it was when you unpacked it and powered it on the first time.
You will have to be on ICS because they removed the option to do this with JB. Just search for the code to enter and you will be fine.

HHF2 said:
Google reprovision, it is a number combination that you enter on the keypad that resets your phone. I had a similar problem that you are having and that fixed our for me. You also need to know that when you do this, it will erase all of your information on the phone. It will be just like it was when you unpacked it and powered it on the first time.
You will have to be on ICS because they removed the option to do this with JB. Just search for the code to enter and you will be fine.
Click to expand...
Click to collapse
Ok. So I tried the reprovsioning mentioned above. When my phone rebooted I was on data and able to make phone calls. Score! However, I checked the IMEI and it said 0. So, thinking that it was just a matter of time before my device began to stop working again... I did the IMEI fix. Now my phone is placing calls and holding data without issue. The OTA updates are flooding in and installing without issues.
I would like to point out, while I feel better having done the combination of both reprovisioning and IMEI fix, ultimately the initial reprovisioning did appear to resolve the issue.
Thanks to everyone for the assistance provided.

[Q] Backup Carrier Info?

Is there a method/software that can backup carrier info? Buddy of mine wants to upgrade to 4.4.2 but he is flashed to Selectel Wireless and that would wipe out his carrier info and have to dish out another $50 to get reflashed again. Was hoping there was a way to backup that info... install 4.4.2 and then reload the info.

No?

define carrier info. Do you mean his IMEI and baseband version?

Mtsprite said:
define carrier info. Do you mean his IMEI and baseband version?
Click to expand...
Click to collapse
Hate to sound stupid, but whatever info you might lose doing an upgrade or even a Factory Reset. He did a reset a couple days after having his phone flashed from Verizon to Selectel and his phone wasn't working right. Was making calls but they were showing up as another number and ended up having to pay the guy that originally flashed it... another $50 to reflash and fix it. Thought there be some method to save this info. I can only imagine there must be a way, as there must be people into messing with roms who have to go through this process each time.

Free can of beer for the correct answer.

Maybe an NVbackup in terminal might do the trick. I don't know. If you figure it out let me know. I'm thinking about flashing another rom and seeing what happens. When I originally had a guy flash selectel I had to be on a TW rom. After this I restored a nandroid of nameless and still had service although in both cases my new number never showed up in about phone / status. I was told to use 8sms to change my phone number in there and then it would show up. On my first flash before I was told about the 8sms trick, I went home and was unable to do anything, no service. I went back flashed TW in his office. Did the 8 sms trick, then restored the same namless nandroid. All is well. Knock on wood. Last night I wanted to wipe data cache and instead of doing it in CWM or actually phil's touch, I did it in the phone settings and it wiped my friggin internal sd partition. What a freaking bummer. Luckily there was nothing super important on there I keep most important stuff on my external SD. I might try tonight to flash a TW just to see if my signal gets a bit better but I'm going to try to figure out how to backup my settings first. The second time there, the owner did the reflash and told me about the 8sms. He was clueless about flashing different roms. There's got to be a way to backup all the needed information in an AOSP rom, or an app, I just gotta figure out how. If you figure this out let me know
Thanks and good luck

No mobile data after flash. Nothing will bring it back

>> 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 !
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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.
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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.