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[Q] No IMEI means radio is broken?

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samdev09
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Default [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?
 
saishyamk
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Quote:
Originally Posted by samdev09 View Post
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?

If you have a nandroid back up, try and restore with it. This could solve ur problem.
 
samdev09
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Originally Posted by saishyamk View Post
If you have a nandroid back up, try and restore with it. This could solve ur problem.
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?
 
saishyamk
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Originally Posted by samdev09 View Post
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?
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/show...95&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.
 
samdev09
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Originally Posted by saishyamk View Post
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/show...95&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.
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.
 
saishyamk
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Originally Posted by samdev09 View Post
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.
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.
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Ashtrix
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(Last edited by Ashtrix; 7th December 2013 at 09:57 AM.)
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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

[Kernel] Mpo / Fancy
[Device] Nexus Prime
[ROM] SlimKAT 4.4.2 -- v4.6
[Recovery] PhilZ_Touch v6.12.8 CWM
[Bootloader] - PrimeLC03
[Baseband] - XXLA2

[Old devices] -- iPhone 2G > Droid > Galaxy S
Hit thanks if anyone had helped you !


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