Develop Bugs

[Help] Phone won't detect sim. Unknown Baseband and IMEI

So... I seem to be having the efs corruption issue with my co-worker's phone. I've been searching all over and have found how others have solved the problem, but it seems that our nv_data.bin is not located in our efs directory.
Does anyone have any idea where these files are? I need to check the last modified dates of their backup files to see if I can restore them >.<
Any help is greatly appreciated!!

Bump.. If anyone knows where these files are this could help us from running into the corrupt efs problem that many people have had. Usually backing up your efs prevents your phone from becoming unable to function as a phone.
I do remember reading something about our unlock code not being present in our nv_data.bin.. And when I check my efs folder in both my, as well as my co-worker's phone there is no nv_data.bin so maybe it has been relocated??
Anyone with knowledge on this subject.. your input would be greatly appreciated! I'm also gonna read over the unlock threads to see if there is any relevant info there.

I am having this problem now, I know you posted this over a month ago, but please tell me you know the location of the backup files or any other solution for this?'
Thank you,

[Q] T989 - Baseband and IMEI Unknown
I have searched and read many threads already. I understand the i9100 uses a file called nv_data.bin and requires its .bak file for a fix.
But, I dont think the t989 is the same because these files dont seem to exist, or at least not in the locations the threads for i9100 state. I am wondering if anyone has had this problem and/or how they fixed it. I know it was caused because of trying to unlock, but I'm looking for a solution.
Thanks!

just buy one of those $20 online unlock or go to your local phone kiosk to have it unlocked
any one with a machine to unlock Samsung phones can get this phone unlocked easily
there's no software unlock yet, as you have found on your searches

I have T-Mobile and don't really care for the unlock, it was a mistake. At this point, I just want to fix the unknown IMEI and unknown Baseband issue. Because of this problem my phone cannot get a signal... Will performing a machine unlock fix this problem?
Note: When I type in *#06# the response is not my IMEI number. It says "null"

svahora said:
I have T-Mobile and don't really care for the unlock, it was a mistake. At this point, I just want to fix the unknown IMEI and unknown Baseband issue. Because of this problem my phone cannot get a signal... Will performing a machine unlock fix this problem?
Note: When I type in *#06# the response is not my IMEI number. It says "null"
Click to expand...
Click to collapse
You can try to find someone locally with a SPT Box2. This unit can flash, unlock & repair IMEI on SGH-T989(d). I was gonna pick one up, but they are like $250 yikes !!

KillaHurtz said:
You can try to find someone locally with a SPT Box2. This unit can flash, unlock & repair IMEI on SGH-T989(d). I was gonna pick one up, but they are like $250 yikes !!
Click to expand...
Click to collapse
What does the (d) stand for?
And, how can I make sure this never happens again in the future? I know there are backup options out there (CWM, Nandroid), but are there any that make a complete clone of the phone's image? In case I mess up the efs or IMEI files again I can restore and be ok.
Thanks!

T989D = Canadian release of T989
they are identical, the just use the D for Canadian

AllGamer said:
T989D = Canadian release of T989
they are identical, the just use the D for Canadian
Click to expand...
Click to collapse
Would a Nandroid backup fix this in the future?

is hard to say, we have no idea where is the real IMEI information is being stored in the new models, but is no longer in the old EFS folder

AllGamer said:
is hard to say, we have no idea where is the real IMEI information is being stored in the new models, but is no longer in the old EFS folder
Click to expand...
Click to collapse
I wonder if the new Galaxy Nexus has its IMEI files stored similarly. If so, we can join forces with that forum group.

If Android is not mounting your firmware properly in the system this will cause no baseband and no imei detected. i would try and flash the stock rom to make sure.

-Mr. X- said:
If Android is not mounting your firmware properly in the system this will cause no baseband and no imei detected. i would try and flash the stock rom to make sure.
Click to expand...
Click to collapse
Did it twice, the stock rom, modem, and kernel.

The radio (modem firmware) might have got corrupted if somebody tried to flash international GS2 ROM or modem.
Try to flash only the Radio (KL1 is the latest for T-Mobile) via ODIN (use PDA slot).

cyberjam said:
The radio (modem firmware) might have got corrupted if somebody tried to flash international GS2 ROM or modem.
Try to flash only the Radio (KL1 is the latest for T-Mobile) via ODIN (use PDA slot).
Click to expand...
Click to collapse
Would the KL1 work any different than the older one? I tried ODINing the original one, and it didn't work and increased the count so I didn't try the KL1.

I just got my replacement phone yesterday for this same problem. Flashed the stock kernal, and also the modem just to be safe and nothing would fix it. From what I know its just a hardware issue, not software. I was chatting with samsung and t-mobile people about this trying all kinds of fixes to nothing left but hardware defect.

Generic IMEI, need help

Hi:
In my infinite stupidity, I can't remember where I kept the backup of the original nv_data.bin when I unlocked the phone. Now, I have a generic IMEI (00466....) and AT&T (Straight Talk) has blocked my device.
I am not sure if there is anyway to recover from this. I already tried various methods (tried the product code approach from captivate, flashed the rooted rogers stock etc).
Would flashing the original rogers stock ROM using ODIN help? If so, where can I find it? Can someone provide a backup of theirs?
Is there a way to edit the nv_data.bin to fix the generic IMEI? Is there a 3rd party service that can help?
Any other ideas?
Thanks,

urundai said:
Hi:
In my infinite stupidity, I can't remember where I kept the backup of the original nv_data.bin when I unlocked the phone. Now, I have a generic IMEI (00466....) and AT&T (Straight Talk) has blocked my device.
I am not sure if there is anyway to recover from this. I already tried various methods (tried the product code approach from captivate, flashed the rooted rogers stock etc).
Would flashing the original rogers stock ROM using ODIN help? If so, where can I find it? Can someone provide a backup of theirs?
Is there a way to edit the nv_data.bin to fix the generic IMEI? Is there a 3rd party service that can help?
Any other ideas?
Thanks,
Click to expand...
Click to collapse
Um, I have mine backed up bit I don't know if they are device specific...
Also people are claiming that the ice update have broken their unlock hack. Maybe that could work for you.

TheHow7zer said:
Um, I have mine backed up bit I don't know if they are device specific...
Also people are claiming that the ice update have broken their unlock hack. Maybe that could work for you.
Click to expand...
Click to collapse
I don't know either. If you can share it, I will try it and see if it helps recover it to my IMEI.
If it doesn't restore it to my IMEI, I will delete it (so it doesn't cause conflicts with your device).
Thanks in advance for help,

[Q] EMEI number changed. how to restore it?

Hi,
I bought second hand a Galaxy Note II. everything works fine except it can´t connect to any provider. I checked the EMEI and it is not the one in the back label.
I searched in Lost or Stolen phones database and this altered EMEI showed up as belonging to an Apple iPhone stolen in Kenya. The search of the legal EMEI in the back label showed no results so I suppose if I can restore the correct EMEI, it should work.
Why the former owner changed a working EMEI to a not working one is beyond my understanding. The phone seems to have the legal not altered firmware or so it says when you enter download mode. May be he attempted to unlock the phone but instead of that he ended up replacing the EMEI information and blocked the phone.
I bought the phone from a trusted seller in ebay who sells stock returns, shop liquidations, etc. I trust them but they don't know the history of the phone before they received it.

jedikalimero said:
Hi,
I bought second hand a Galaxy Note II. everything works fine except it can´t connect to any provider. I checked the EMEI and it is not the one in the back label.
I searched in Lost or Stolen phones database and this altered EMEI showed up as belonging to an Apple iPhone stolen in Kenya. The search of the legal EMEI in the back label showed no results so I suppose if I can restore the correct EMEI, it should work.
Why the former owner changed a working EMEI to a not working one is beyond my understanding. The phone seems to have the legal not altered firmware or so it says when you enter download mode. May be he attempted to unlock the phone but instead of that he ended up replacing the EMEI information and blocked the phone.
I bought the phone from a trusted seller in ebay who sells stock returns, shop liquidations, etc. I trust them but they don't know the history of the phone before they received it.
Click to expand...
Click to collapse
Did your imei change to 004999010640000? this is a common problem happening to lots of people when they flashed the newest firmware and then an older, if thats the case; you should try to flash the original firmware(Sammobile), or look if somewhere in the memory of the phone a file called efs backup is found. Otherwise you're having a big problem.

Armazia said:
Did your imei change to 004999010640000? this is a common problem happening to lots of people when they flashed the newest firmware and then an older, if thats the case; you should try to flash the original firmware(Sammobile), or look if somewhere in the memory of the phone a file called efs backup is found. Otherwise you're having a big problem.
Click to expand...
Click to collapse
Yes, that's exactly the EMEI number!
no efs backup file found.
I will try flashing stock BTU firmware from Sammobile but can this restore the EMEI?

jedikalimero said:
Yes, that's exactly the EMEI number!
no efs backup file found.
I will try flashing stock BTU firmware from Sammobile but can this restore the EMEI?
Click to expand...
Click to collapse
You can try, I heared rumor that it saved some of their phone. If that doesn't work there won't be any way you'll get your original imei back for free, so you'll possibly need to contact Samsung. Try to install the latest firmware of samsung(MG1 I guess).

Armazia said:
You can try, I heared rumor that it saved some of their phone. If that doesn't work there won't be any way you'll get your original imei back for free, so you'll possibly need to contact Samsung. Try to install the latest firmware of samsung(MG1 I guess).
Click to expand...
Click to collapse
I found this thread:
http://forum.xda-developers.com/showthread.php?p=44346301#post44346301
I have downloaded the mentioned ZIP file but I don't know how to flash it.

jedikalimero said:
I found this thread:
http://forum.xda-developers.com/showthread.php?p=44346301#post44346301
I have downloaded the mentioned ZIP file but I don't know how to flash it.
Click to expand...
Click to collapse
Well just go through the original dev thread and search fr dr.ketan thread on how to root etc u will find answer to evrytying u want to know abt the device

Hello All,
I'm having the same problem, no Imei and no phone signal
I have a efs.tar.gz backup file but I don't know how to restore it.
I saw methods to restore .bin files but not tar.gz
Can someone help me with that?
Thanks in advanced :good:

Use this
http://forum.xda-developers.com/showthread.php?t=1918601
Worked for me
Sent from my GT-N7100 using xda app-developers app

Techno848 said:
Use this
http://forum.xda-developers.com/showthread.php?t=1918601
Worked for me
Sent from my GT-N7100 using xda app-developers app
Click to expand...
Click to collapse
The OP says this won't work in my case:
Q: My imei number like 0000**** or 0049**** if i flash this patch it will work or it will bring my original imei number back ?
A: This patch is not about your EFS Folder it is just about network so it won't fix your imei number or bring your original imei number back.
Click to expand...
Click to collapse

http://forum.xda-developers.com/showthread.php?t=1518694

[Q] No IMEI means radio is broken?

Phone: Samsung Galaxy Nexus GT-i9250TSGGen
I had a stock android version, that I never rooted or flashed. Suddenly the SIM stopped working, I figured out that there is no IMEI number and the baseband is unknown.
I flashed to a custom ROM, and tried to do few things using the Galaxy Nexus Toolkit:
1) custom ROM android 4.1
2) Flashed a custom radio
3) made a copy of the /efs folder, deleted the original and replaced it after restart.
The Samsung service center said the entire board has to be changed, with an estimated cost of $140 USD.
Can someone help me with my options? Is it definitely a hardware problem? is there anyway to know for sure?

samdev09 said:
Phone: Samsung Galaxy Nexus GT-i9250TSGGen
I had a stock android version, that I never rooted or flashed. Suddenly the SIM stopped working, I figured out that there is no IMEI number and the baseband is unknown.
I flashed to a custom ROM, and tried to do few things using the Galaxy Nexus Toolkit:
1) custom ROM android 4.1
2) Flashed a custom radio
3) made a copy of the /efs folder, deleted the original and replaced it after restart.
The Samsung service center said the entire board has to be changed, with an estimated cost of $140 USD.
Can someone help me with my options? Is it definitely a hardware problem? is there anyway to know for sure?
Click to expand...
Click to collapse
If you have a nandroid back up, try and restore with it. This could solve ur problem.

saishyamk said:
If you have a nandroid back up, try and restore with it. This could solve ur problem.
Click to expand...
Click to collapse
Thanks, but I hadn't created a back up before. Is there a way to use a back up from a different phone? where would l find more information?

samdev09 said:
Thanks, but I hadn't created a back up before. Is there a way to use a back up from a different phone? where would l find more information?
Click to expand...
Click to collapse
I had an old nandroid back up and I used the method in this post to fix my IMEI problem: forum.xda-developers.com/showpost.php?p=47048361&postcount=9
And when you said you took a back up of the /EFS folder, you meant pulled the .bin and .md5 files from the /factory or the /radio folders OR did you use something like kTool? Because, as people have pointed out in other threads there is no /EFS folder for the Galaxy Nexus. The IMEI information is stored in the Radio and Factory Folders. For more information on how IMEI works on the GNEx, refer to this post: http://forum.xda-developers.com/showpost.php?p=47045295&postcount=6
But you are saying the baseband is also unknown. A radio flash should have fixed it. Try restoring Stock ICS using Odin. i hear this fixes some problems like this. U can use thus guide forum.xda-developers.com/showthread.php?t=2065470
If Odin is a little complicated, try the Nexus Root Tool kit. U gotta experiment to find the right problem and them fix it. No other go. I doubt that replacing the board will solve it as it looks like a software issue, unless you fried your radios.

saishyamk said:
I had an old nandroid back up and I used the method in this post to fix my IMEI problem: forum.xda-developers.com/showpost.php?p=47048361&postcount=9
And when you said you took a back up of the /EFS folder, you meant pulled the .bin and .md5 files from the /factory or the /radio folders OR did you use something like kTool? Because, as people have pointed out in other threads there is no /EFS folder for the Galaxy Nexus. The IMEI information is stored in the Radio and Factory Folders. For more information on how IMEI works on the GNEx, refer to this post: http://forum.xda-developers.com/showpost.php?p=47045295&postcount=6
But you are saying the baseband is also unknown. A radio flash should have fixed it. Try restoring Stock ICS using Odin. i hear this fixes some problems like this. U can use thus guide forum.xda-developers.com/showthread.php?t=2065470
If Odin is a little complicated, try the Nexus Root Tool kit. U gotta experiment to find the right problem and them fix it. No other go. I doubt that replacing the board will solve it as it looks like a software issue, unless you fried your radios.
Click to expand...
Click to collapse
Thanks again. Yes, the /efs folder is not where it was supposed to be. I did find the correct location and moved it. I will try using your ideas. Just one more question:
Since I had not done anything that would wipe out my IMEI number (neither software hacking nor physical damage). I wonder why this problem suddenly occurred. Just to eliminate a possibility, how can I know for sure that I have not "fried the radios"?
Appreciate your help. If I know that it is a software problem, I can continue to play with the Nexus toolkit and try different solutions.

samdev09 said:
Thanks again. Yes, the /efs folder is not where it was supposed to be. I did find the correct location and moved it. I will try using your ideas. Just one more question:
Since I had not done anything that would wipe out my IMEI number (neither software hacking nor physical damage). I wonder why this problem suddenly occurred. Just to eliminate a possibility, how can I know for sure that I have not "fried the radios"?
Appreciate your help. If I know that it is a software problem, I can continue to play with the Nexus toolkit and try different solutions.
Click to expand...
Click to collapse
I'm not sure how to check if your radio is fried. Basically, it means something's wrong with your hardware, where you experience occasional or complete signal loss. But in your case, you lost your IMEI. So, back up your nv_data files, flash using NRT or ODIN and see what happens.
NRT will push the stock radio while doing the "Flash Stock + Unroot" Option. So, you'll get the stock baseband as well. This should fix it. If your IMEI still doesn't work, try restoring the nv_data.bin and md5 files you backed up as mentioned in the link I posted.
Let me know how it works out. :good:

Always make a backup of /EFS (Support in both PhilZ_CWM & TWRP )for safety, though the IMEI would be only wiped by CWM wipe /factory option......happened to me a few days back, luckily i got my /efs restored & flashing stock doesn't bring any IMEI back since it's actually phone specific plus comes with a proper MD5 !!
the above method should work and here more info on the EFS

Can someone provide me their g960f EFS folder? (NOT the IMEI or anything sensitive)

Long story short, I screwed up and I deleted everything from my EFI folder. No backup (captain hindsight) Doing a stock flash with Odin seemed to kinda restore the EFS, but I have generic IMEI and no network support. I have my IMEI (its on the back of the phone). I tried to write it with z3x, but it gives an error. I think its because my EFS is not "correct". If someone could provide me their EFS folder. NOT the IMEI folder or anything that you consider as sensitive (beggars cant be choosers) I would be grateful.
I am struggling 3 days now trying to get my phone back, every forum post and youtube video about restoring IMEI is a scam and/or full of viruses.
Any help would be appreciated, every guide that seemed legit is outdated and doesnt work on s9 with android Q.
Thanks in advance.

Hi there
palamosteliaro said:
Long story short, I screwed up and I deleted everything from my EFI folder. No backup (captain hindsight) Doing a stock flash with Odin seemed to kinda restore the EFS, but I have generic IMEI and no network support. I have my IMEI (its on the back of the phone). I tried to write it with z3x, but it gives an error. I think its because my EFS is not "correct". If someone could provide me their EFS folder. NOT the IMEI folder or anything that you consider as sensitive (beggars cant be choosers) I would be grateful.
I am struggling 3 days now trying to get my phone back, every forum post and youtube video about restoring IMEI is a scam and/or full of viruses.
Any help would be appreciated, every guide that seemed legit is outdated and doesnt work on s9 with android Q.
Thanks in advance.
Click to expand...
Click to collapse
Did you ever manage to get this sorted, i have exactly same problem?

If your imei is screwed up try flashing the proper base band. Imei isn't stored in efs. And the imei is based on a cert file. Cannot just be written to the device