IMEI numbers lost: disappearing then sometimes returning on reboot - Samsung Galaxy S7 Questions and Answers

I'm using an G930FD on EE in the UK. I'm using TWRP, Magisk v16 and the dm-verity patch. Otherwise no other significant mods.
I have a strange issue with my IMEI numbers disappearing. I have read and tried the combination rom guide to try to restore my IMEI, which didn't work but I don't think this is the issue as I can get the IMEIs back when I reboot. Well, sort of.
When this happened to me, when I was on the Korean stock rom, I thought I'd reinstall a full, stock BTU rom (AP, BL, CP and CSC) and this fixed it for a bit. (I did full wipe and formatted the data partition but I did not use Odin's 're-partition' option.)
Then, after a few days, I'd see the no signal symbol. I'd reboot and all would be well. But... this only works for a couple of days, getting progressively less likely to work, then it won't ever see show the IMEI. In 'status' in the settings the IMEI is shown as all zeros.
I've seen other people with similar issues, where reboot fails to fix it in the end, but I haven't seen any solutions. I've been limping along just using WhatsApp and a VOIP service but I'm really struggling.
I have a TWRP EFS backup, so could try to restore that? Should I try a clean stock rom install again but this time using re-partition? What about just flashing the modem/CP?

<removed>

Some more info on this one. I was trying Smart Switch to try to move temporarily to an unrooted phone. Shortly after the Smart Switch apps was installed on my phone, the signal came back! It seems that something Smart Switch touched caused the EFS data to be accessible again. I'm guessing it could point to permissions. Anyway, it's been running for a couple of days without a hitch so perhaps it's fixed.
If anyone has a theory as to what happened I'd be interested to hear it.

Back to square one.
The issue came back after the Smart Switch fix. It was just the same as before, with a reboot being able to fix it at first then after a few days it failed completely. Running Smart Switch again fixed it but it feels like it'll happen again. Does anyone have any idea how to fix this?

ALWAYS backup your EFS folder, no matter what phone u have., and then save it on ur PC.
https://forum.xda-developers.com/s7-edge/how-to/guide-how-to-fix-check-drk-imei-issues-t3379516
This link solves most ppl with IMEI problems.

Related

[Q] Does anyone want to help me out yet? -_-

Okay, I'm basically going to just copy and paste my issue and edits here from the Zeus thread I couldn't get any help on. The edits are so anyone who actually read this can see what I did and have been doing so they don't suggest something I already did.
So the other day, I tried to flash to the Doctorz ROM and of course, made a Nandroid backup. After messing with Doctorz, I went back to Nandroid or clockwork recovery (whatever it is) and after restoring, I was on another modem and stock kernel. I tried to reflash Zeus and wiped partitions cache and dalvik cache and now I'm having serious issues. I have my SIM card in my phone, but it keeps telling me I don't even though it's there. Even weirder, I have one or two bars even after I pull out the SIM card. Earlier, it was detecting that I had a SIM card, but said "Invalid SIM card" or something and now whether it's there or not, my phone says it has one or two bars even though I can't do anything. What's going on??
I've tried rebooting several times and activated Wifi and airplane mode, but had no luck. SIM card's in right now, but my phone says no service.
EDIT: Forget it. I just did a factory restore and wiped everything and reflashed Zeus.
EDIT 2: Okay now I'm having other issues. My phone recognizes my SIM card again and now I'm getting my normal signal, but I can't do anything wirelessly, like send a text or use up data. It SAYS I have signal and am connected to the HSPA+ network and the arrows are flashing and whatnot, but I can't do anything wireless. I can't go into the market, send a text or use the internet browser. Someone please help?
EDIT 3: Okay, I was wrong on that last part. My texts weren't going through because of bad signal, but I definitely have no data AT ALL. All I have are a few bars, but nothing about 3g/EDGE/HSPA+. I think this is an issue with APN settings?
EDIT 4: Messed with some APN settings... kinda back to square one, where the H+ shows up and I get Edge sometimes (I have bad signal where I'm at) and the arrows are flashing, but NOTHING. I still can't use the market or any data at all.
EDIT 5: I just decided I'd try to be next to my router and turned on Wifi... my phone would not pick up a signal from my router at all, and it works just fine. I'm starting to think this is a modem-related issue...
EDIT 6: Okay, I kinda fixed the problem, but my data speeds are SUPER SLOW and sending one message takes a really long time. I know I have bad signal, but it's never been this slow, even when I manage to pull up two or three bars. I tried messing with build.prop, but as I'm on Zeus, the settings were already fixed up.
EDIT 7: Okay, the Wifi issue was because I used the wrong WEP key. Oops. After I managed to connect though, I couldn't get any data. My phone just doesn't want to use up any data apparently? I reflashed the modem Zeus normally uses and now if I manage to get some data, it's unbelievably slow and can't use Wifi data.
EDIT 8: I forgot to mention that if I don't get to connect somewhere with data, my phone will just tell me there's no data connection or whatever even though I have two bars. I tried to fix permissions and rebooted, but no luck.
Someone please help. This is really annoying.
FaintPuppet said:
Okay, I'm basically going to just copy and paste my issue and edits here from the Zeus thread I couldn't get any help on. The edits are so anyone who actually read this can see what I did and have been doing so they don't suggest something I already did.
So the other day, I tried to flash to the Doctorz ROM and of course, made a Nandroid backup. After messing with Doctorz, I went back to Nandroid or clockwork recovery (whatever it is) and after restoring, I was on another modem and stock kernel. I tried to reflash Zeus and wiped partitions cache and dalvik cache and now I'm having serious issues. I have my SIM card in my phone, but it keeps telling me I don't even though it's there. Even weirder, I have one or two bars even after I pull out the SIM card. Earlier, it was detecting that I had a SIM card, but said "Invalid SIM card" or something and now whether it's there or not, my phone says it has one or two bars even though I can't do anything. What's going on??
I've tried rebooting several times and activated Wifi and airplane mode, but had no luck. SIM card's in right now, but my phone says no service.
EDIT: Forget it. I just did a factory restore and wiped everything and reflashed Zeus.
EDIT 2: Okay now I'm having other issues. My phone recognizes my SIM card again and now I'm getting my normal signal, but I can't do anything wirelessly, like send a text or use up data. It SAYS I have signal and am connected to the HSPA+ network and the arrows are flashing and whatnot, but I can't do anything wireless. I can't go into the market, send a text or use the internet browser. Someone please help?
EDIT 3: Okay, I was wrong on that last part. My texts weren't going through because of bad signal, but I definitely have no data AT ALL. All I have are a few bars, but nothing about 3g/EDGE/HSPA+. I think this is an issue with APN settings?
EDIT 4: Messed with some APN settings... kinda back to square one, where the H+ shows up and I get Edge sometimes (I have bad signal where I'm at) and the arrows are flashing, but NOTHING. I still can't use the market or any data at all.
EDIT 5: I just decided I'd try to be next to my router and turned on Wifi... my phone would not pick up a signal from my router at all, and it works just fine. I'm starting to think this is a modem-related issue...
EDIT 6: Okay, I kinda fixed the problem, but my data speeds are SUPER SLOW and sending one message takes a really long time. I know I have bad signal, but it's never been this slow, even when I manage to pull up two or three bars. I tried messing with build.prop, but as I'm on Zeus, the settings were already fixed up.
EDIT 7: Okay, the Wifi issue was because I used the wrong WEP key. Oops. After I managed to connect though, I couldn't get any data. My phone just doesn't want to use up any data apparently? I reflashed the modem Zeus normally uses and now if I manage to get some data, it's unbelievably slow and can't use Wifi data.
EDIT 8: I forgot to mention that if I don't get to connect somewhere with data, my phone will just tell me there's no data connection or whatever even though I have two bars. I tried to fix permissions and rebooted, but no luck.
Someone please help. This is really annoying.
Click to expand...
Click to collapse
Damn! That's a lot of edits. Odin back to stock, and start from scratch. But remember to do a factory reset from Phone, go to settings, Privacy and erase everything. that will clean up everything that you have there.
That's the only option I see will fix all your problems
Ltilt2 said:
Damn! That's a lot of edits. Odin back to stock, and start from scratch. But remember to do a factory reset from Phone, go to settings, Privacy and erase everything. that will clean up everything that you have there.
That's the only option I see will fix all your problems
Click to expand...
Click to collapse
Yeah, that's all I could come up with. Thanks anyway. I did that a few minutes ago and flashed Zeus. I'm just waiting for my phone to load up. I tried to let it load up, but it kept saying not enough data on the partition or something. I probably shouldn't have tried to flash Zeus immediately after flashing back to stock. After I went to CWM from flashing to stock, I immediately tried to flash to Zeus, but had issues. I'll take the blame for trying to rush and take shortcuts. I'll see how this goes again though.
Okay, after flashing back to stock with Odin, my phone loads up and does the "Rethink possible" thing when you turn it on and after that, nothing happens. The screen just stays off. If I press the power button, nothing happens, but if I hold it, it just reboots and goes back off. This is just annoying...
EDIT: Okay, it worked the second time. I have no idea why as I did nothing different, but it works. Now I'm gonna try to flash Zeus again.
FaintPuppet said:
Okay, after flashing back to stock with Odin, my phone loads up and does the "Rethink possible" thing when you turn it on and after that, nothing happens. The screen just stays off. If I press the power button, nothing happens, but if I hold it, it just reboots and goes back off. This is just annoying...
EDIT: Okay, it worked the second time. I have no idea why as I did nothing different, but it works. Now I'm gonna try to flash Zeus again.
Click to expand...
Click to collapse
Faint,
I got lost trying to understand what you were trying to ask.
Gtg unbrick is prob the best option.
It's usually best to describe the system, setup, the bug and the attempt.
Then pose the bottom line question.
Check my last sigs link.
qkster said:
Faint,
I got lost trying to understand what you were trying to ask.
Gtg unbrick is prob the best option.
It's usually best to describe the system, setup, the bug and the attempt.
Then pose the bottom line question.
Check my last sigs link.
Click to expand...
Click to collapse
Well what I was asking originally was how I can fix the problem I was having, but flashing back to stock via Odin helped. Now I'm having ANOTHER issue... after FINALLY having fixed up everything, I tried to restore some stuff with Tibu, but then my phone started saying a bunch of processes were force closing or something, so I tried to reboot and now I think I'm bootlooping. I'm stuck at the "The Collective" thing that shows up when you boot up your phone and it doesn't do anything. It'll go and do what it normaly does, go black and start up again, then come to a complete stop and repeat the process. I then went to CWM and tried to wipe factory settings, cache and dalvik cache, but I'm still having this issue. Geez, it's one problem after another, and all I wanted to do was restore my apps. On the bright side, I DO KNOW flashing from Odin helped because once I regained control of my phone at the way it should be normally, I had my normal data speeds and didn't have issues with data. I'm going to try to fix this bootlooping issue now. :|
EDIT: Escaped the bootloop(?). Thank God... I honestly thought I'd have to flash back to stock with ODIN AGAIN and then redo everything.
Hey, so another question... before I flashed to stock and everything, I backed up all of my apps with TiBU, but now I can't find them; the restore file(s?) so I can get all of my apps and their data back. Was it saved to the internal SD card? Because I formatted that after backing up...
EDIT: Never mind. I looked around my SD card and... ugh. All my apps are gone and so are my backup files for the apps. Great. Thanks anyway, you two.
FaintPuppet said:
Well what I was asking originally was how I can fix the problem I was having, but flashing back to stock via Odin helped. Now I'm having ANOTHER issue... after FINALLY having fixed up everything, I tried to restore some stuff with Tibu, but then my phone started saying a bunch of processes were force closing or something, so I tried to reboot and now I think I'm bootlooping. I'm stuck at the "The Collective" thing that shows up when you boot up your phone and it doesn't do anything. It'll go and do what it normaly does, go black and start up again, then come to a complete stop and repeat the process. I then went to CWM and tried to wipe factory settings, cache and dalvik cache, but I'm still having this issue. Geez, it's one problem after another, and all I wanted to do was restore my apps. On the bright side, I DO KNOW flashing from Odin helped because once I regained control of my phone at the way it should be normally, I had my normal data speeds and didn't have issues with data. I'm going to try to fix this bootlooping issue now. :|
EDIT: Escaped the bootloop(?). Thank God... I honestly thought I'd have to flash back to stock with ODIN AGAIN and then redo everything.
Hey, so another question... before I flashed to stock and everything, I backed up all of my apps with TiBU, but now I can't find them; the restore file(s?) so I can get all of my apps and their data back. Was it saved to the internal SD card? Because I formatted that after backing up...
EDIT: Never mind. I looked around my SD card and... ugh. All my apps are gone and so are my backup files for the apps. Great. Thanks anyway, you two.
Click to expand...
Click to collapse
If you did a factory reset from within the phone, it will erase everything...
After you odin or heimdall a stock package, and flash a new ROM, don't restore tibu or apps. Download new.
Occasionally they get corrupted and cause you phone to soft boot
FaintPuppet said:
Well what I was asking originally was how I can fix the problem I was having, but flashing back to stock via Odin helped. Now I'm having ANOTHER issue... after FINALLY having fixed up everything, I tried to restore some stuff with Tibu, but then my phone started saying a bunch of processes were force closing or something, so I tried to reboot and now I think I'm bootlooping. I'm stuck at the "The Collective" thing that shows up when you boot up your phone and it doesn't do anything. It'll go and do what it normaly does, go black and start up again, then come to a complete stop and repeat the process. I then went to CWM and tried to wipe factory settings, cache and dalvik cache, but I'm still having this issue. Geez, it's one problem after another, and all I wanted to do was restore my apps. On the bright side, I DO KNOW flashing from Odin helped because once I regained control of my phone at the way it should be normally, I had my normal data speeds and didn't have issues with data. I'm going to try to fix this bootlooping issue now. :|
EDIT: Escaped the bootloop(?). Thank God... I honestly thought I'd have to flash back to stock with ODIN AGAIN and then redo everything.
Hey, so another question... before I flashed to stock and everything, I backed up all of my apps with TiBU, but now I can't find them; the restore file(s?) so I can get all of my apps and their data back. Was it saved to the internal SD card? Because I formatted that after backing up...
EDIT: Never mind. I looked around my SD card and... ugh. All my apps are gone and so are my backup files for the apps. Great. Thanks anyway, you two.
Click to expand...
Click to collapse
One more thing to add on to the TiBu thing, when you restored your apps what option did you use? If your restoring the batch options only select "missing apps with data.". Any other option and you run the risk of getting constant FC's.
Sent from my Transformer Prime TF201 using xda premium
That's why every time I flash a new Rom, I always never back up anything. I rather start from scratch and go from there. This I know for sure I wont have any issues.
Sent from my SAMSUNG-SGH-I997 using XDA App
Did we helped you out yet?
I have found this to be the best for me also, new ROM...fresh install of all apps...so easy when you have the apk's, I just put them in a folder, then to my sd and install away and if I need to update I look that app via the market and update that way, or via the desktop pc thru the market online.
I found this site very useful has all my apps I need/require:
http://www.apktops.com/
Ltilt2 said:
That's why every time I flash a new Rom, I always never back up anything. I rather start from scratch and go from there. This I know for sure I wont have any issues.
Sent from my SAMSUNG-SGH-I997 using XDA App
Click to expand...
Click to collapse
xIC-MACIx said:
One more thing to add on to the TiBu thing, when you restored your apps what option did you use? If your restoring the batch options only select "missing apps with data.". Any other option and you run the risk of getting constant FC's.
Sent from my Transformer Prime TF201 using xda premium
Click to expand...
Click to collapse
^Yeah I didn't use that option because it had a zero and didn't let me do anything, so I tried another option. I can't remember which one, but yeah I did get constant FC's.
Ltilt2 said:
That's why every time I flash a new Rom, I always never back up anything. I rather start from scratch and go from there. This I know for sure I wont have any issues.
Sent from my SAMSUNG-SGH-I997 using XDA App
Click to expand...
Click to collapse
Yeah, it seems that's the best way to go. Even though I backed it up with CWM, I didn't expect it to not backup the kernel and modem. I realized the kernel part a lot sooner, but after having a lot of texts that didn't go through the way they normally would, I thought it was an issue with my phone and then I decided I'd check the modem and found out I didn't have the KL2 modem I'd normally have.
qkster said:
Did we helped you out yet?
Click to expand...
Click to collapse
Well I already had everything figured out by the time everyone said something, but I appreciate the effort and tips nonetheless.

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.

Problem after flashing 4.3 rom causing me to be stuck in 2g

I am having a huge issue with my phone. I have been flashing custom roms for the past few years and this is the first time I have ever ran into a issue like this. I flashed SlimRom 4.3 build 2 a couple weeks back, it was taking forever to switch between 3g and LTE sometimes up to 5 mins to lock. Not to mention the signal was super low. I ignored it for the most part as it is a newer rom and figured it was just a bug and would hold off for now till kitkat released.
Then my phone would just start random rebooting about once or twice a day. Then on my way home from work i was bluetoothed to my vehicle when it did a random reboot. After that Ive been stuck in 1xRTT since. I also managed to loose my IMEI and PRL version they are both set at 0 and I do not have a backup. Has anyone else ever had this issue? I don't have a clue how to get it working again. My phone is out of warranty I am in the midst of flashing it back to stock to see if that works. Ive searched for hours trying to find a fix. Thanks.
Reverted back to stock.still no luck. Also play store won't work. No connection wirh retry button even while connected to wifi
What firmware/radio do you have? If you've been on custom roms a while you might need to update your radio baseband (most current is VRBMF1). You can flash an updated radio without regard for the Rom you're using.
Sent from my SCH-I535 using xda app-developers app
---------- Post added at 10:29 AM ---------- Previous post was at 10:25 AM ----------
The imei thing is a separate issue. I lost mine without a backup when I first started flashing roms... I think it was cM at the time. I ended up going all the way back to an early stock image, grabbing the OTA updates and then rooting and flashing all over again. I don't know what part in particular got me my imei back.
Sent from my SCH-I535 using xda app-developers app
Do you mean a backup of efs partition or a nandroid? There is a thread at rootzwiki about recovering your imei-efs items. When u get it back do
Su
Reboot nvbackup
In a terminal then you wont have to worry about this again. If you have a nandroid restore it and you'll b good.
Yes my efs folder was completely empty. I reverted back to stock 4.0.4 still had a "0" for IMEI so i used QPST and entered in the IMEI manually and it stuck. I have signal back now. I just got factory mode off. Now my phone is stuck on "Activating", a factory reset should fix that. So this is resolved. Thanks for the help.
quicksilv312 said:
Yes my efs folder was completely empty. I reverted back to stock 4.0.4 still had a "0" for IMEI so i used QPST and entered in the IMEI manually and it stuck. I have signal back now. I just got factory mode off. Now my phone is stuck on "Activating", a factory reset should fix that. So this is resolved. Thanks for the help.
Click to expand...
Click to collapse
Is this the fix to get everything up and running again (flash back to ICS)? I was about to start my own thread until I read this. I lost my IMEI, ERI and MEID but didn't back it up first (I know I know ... boo). I manually input my IMEI using QPST like you did and was also able to fix my ERI and MEID and now I have data and text, but still no voice connection. I've flashed a stock (rooted) ROM and tried the reprovision code *2767*3855# and the RTN codes ##786# & ##72786# but nothing happens (I've seen in other forums this only works in ICS and not JB). Last night I downloaded a stock unrooted JB ROM (4.1.2) and ICS ROM (4.0.4) and am planning to ODIN back to stock and complete a factory reset to see if it will kick the gears back in motion again.
I'm not meaning to hi-jack this thread but confirm this is the solution to completing a non-backed-up IMEI/ERI/MEID fix.
-Edit-
There are tons of threads out there starting with "I've lost signal, what happened?" and ending with "I'll report back and let you know what I've found." or "Verizon replaced it for me." but none offer a viable user solution. I'd love to see the answer posted so other searchers out there can find help.
I can confirm everything you did will restore your IMEI/ERI and connectivity. I did all the steps you did (manually input IMEI and use the utility to repair ERI and MEID), then reverted back to unrooted stock using odin. I still didn't have signal until I did a factory restet IN THE ROM. Going back to stock using odin and doing a factory reset in CWM didn't fix the issue, but going into the phone's settings and completing a factory reset from there caused my signal and connection to come back.

[SOLVED] i317M - not connecting to network

Hello,
I started with Galaxy Note 2- i317M (rogers, canada), rooted with DN3 V4 beta installed. But I wanted to try DN4, so I created a back-up using TWRP and tried installing DN4. However, I later realized that it is not for the LTE versions yet and phone did not recognize SIM anymore. So I wiped the data and tried installing dn3 v5.5, but the phone still did not connect.
Losing all hope I installed DNv4 again, but it still did not work. So i finally just tried restoring from the back-up I made using TWRP. Everything in the phone is same except no network.
Finally I tried restoring from back-up after doing a complete wipe of internal storage and everything except the external card. But still the error does not go away. I researched more about the error and the fact that my imei shows up as null/null. I used the instructions of using EFS professional, but it did not work. The model number in my phone now shows up as SM-G900F and baseband shows as unknown, and it shows DN3V5 Rom despite the clean-up and restoring from DN3V4.
Any guidance available on this please...I need specific steps because after 12 hour search and try-outs I am lost now.....
UPDATE:
Solved it! Here is the solution for anyone in this problem
http://forum.xda-developers.com/showpost.php?p=46231268&postcount=4
worked like a charm.. No reason to throw this and get a new phone
I have had this problem. It didn't happen whilst flashing though. My imei number is now a generic one and I had no efs backup. After 5 days of trying everything I can find I'm giving up. My note 2 is dead as far as I'm concerned. As far as I'm aware to get my imei back I'll have to send it for repair so I'll buy another phone and not a Samsung
I don`t think your phones are dead. I didn`t try it personally, but I`m sure you can restore your EFS back. Just you need to do some research, maybe you could start here:
https://www.google.ro/?gws_rd=ssl#safe=off&q=how+to+recover+efs+folder
Do not give up, read on end you will eventually do it! And, by the way, next time maybe you don`t forget to back up before doing anything to your phone!
nmugurel2003 said:
I don`t think your phones are dead. I didn`t try it personally, but I`m sure you can restore your EFS back. Just you need to do some research, maybe you could start here:
https://www.google.ro/?gws_rd=ssl#safe=off&q=how+to+recover+efs+folder
Do not give up, read on end you will eventually do it! And, by the way, next time maybe you don`t forget to back up before doing anything to your phone!
Click to expand...
Click to collapse
I did back up. with both titanium backup and twrp but it is not working. And I dont think I will give up. I will format is all together and start over if i have to.
Do you think it will work if I format it entirely and start over?
dexterousyash said:
I did back up. with both titanium backup and twrp but it is not working. And I dont think I will give up. I will format is all together and start over if i have to.
Do you think it will work if I format it entirely and start over?
Click to expand...
Click to collapse
Glad to see you solved it!

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 !
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.

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