[Q] IMEI Problem!!!!!! HELPPP!! - Galaxy S II Q&A, Help & Troubleshooting

I flashed a JB ROM to my stock ICS ROM on my international S2 and my imei number keeps coming and going for away, it'll be there one second and if I restart it'll go away then come back randomly. I can't find any solutions anywhere, do you know what could be the problem? Anyone have a solution lol? i cant flash any ROMs, too scared to brick my phone

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I'm not really into Samsung devices but maybe this thread will help you:
http://forum.xda-developers.com/showthread.php?t=1261948

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well...that's what I call a dynamic IMEI.
Get sii_repair from play store.
Sent from the little guy

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Azurael said:
I'm not really into Samsung devices but maybe this thread will help you:
http://forum.xda-developers.com/showthread.php?t=1261948
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yeh that didnt helo, thanks anyway!

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gastonw said:
well...that's what I call a dynamic IMEI.
Get sii_repair from play store.
Sent from the little guy
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yeh i have that, i went back to me nandroid back up and my imei number was gone, so i used it to restore it, it took a couple of restarts to work but does that mean everytime i restart its gonna go away?

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doesnt anyone have the same problem?

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rohin26 said:
doesnt anyone have the same problem?
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So you were restoring nandroid backup and you lost your phone's IMEI? No never happened to me. But you should have made a backup for it dude!
Edit: Okay got it. Install Root Explorer pro and check whether the efs folder is there or not. Set the same permissions from another I9100 and then reboot. Set the same permissions for each file in that folder and the folder itself. If you have made a backup in the form of .tar file then use HC ktool to restore your efs folder. It would automatically set the permissions required!

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shahrozeumar said:
So you were restoring nandroid backup and you lost you IMEI afterwards? No never happened to me. But you should have made a backup for it dude!
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no thats not what happened. I rooted my 4.0.4 using Odin and Siyah Kernel v5. Straight after rooting it, i downloaded GSII_repair from the app store and backed up my efs. Then i downloaded Titanium and backed up everything. Then i went to recovery mode and made a back up. I finally flashed the Resurrection ROM v3.1.3, i rebooted, everything was working fine, like imei was there and so was signal, i restarted my phone and my imei number went away, so i used the GSII_repair app to restore, it worked fine. I restarted my phone again, imei was gone yet again. So i decided to go back to my stock ROM back up, imei was gone, i restored, everything working fine now. Just not sure whats happening because i have rooted phones before and that has never happened to me, every time i restart, imei goes away, sometimes it comes back, sometimes it doesnt. What has happened? just reallly confused. i have a back up of my EFS though.

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rohin26 said:
no thats not what happened. I rooted my 4.0.4 using Odin and Siyah Kernel v5. Straight after rooting it, i downloaded GSII_repair from the app store and backed up my efs. Then i downloaded Titanium and backed up everything. Then i went to recovery mode and made a back up. I finally flashed the Resurrection ROM v3.1.3, i rebooted, everything was working fine, like imei was there and so was signal, i restarted my phone and my imei number went away, so i used the GSII_repair app to restore, it worked fine. I restarted my phone again, imei was gone yet again. So i decided to go back to my stock ROM back up, imei was gone, i restored, everything working fine now. Just not sure whats happening because i have rooted phones before and that has never happened to me, every time i restart, imei goes away, sometimes it comes back, sometimes it doesnt. What has happened? just reallly confused. i have a back up of my EFS though.
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Oh man that is really heart wrenching. Atleast you made a backup before messing with your phone. Okay now can you restore your efs? If yes then restore it and download HC ktool and make another backup for it. Then restart your phone and if you lose it again then restore it using HC ktool. You can try EFS Pro from your PC as well.

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shahrozeumar said:
Oh man that is really heart wrenching. Atleast you made a backup before messing with your phone. Okay now can you restore your efs? If yes then restore it and download HC ktool and make another backup for it. Then restart your phone and if you lose it again then restore it using HC ktool. You can try EFS Pro from your PC as well.
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okay i'll try that, sorry for the noob question but whats the difference between HC ktool and GSII_repair?

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rohin26 said:
okay i'll try that, sorry for the noob question but whats the difference between HC ktool and GSII_repair?
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They are two different tools I guess for efs backup and restore. HC ktool can also make backup for your kernel that your are currently on!

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shahrozeumar said:
They are two different tools I guess for efs backup and restore. HC ktool can also make backup for your kernel that your are currently on!
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just restarted my phone and checked, the imei number is showing. i didnt have to restore or anything. Is it safe to flash a ROM now? or any risk of brick? thanks for your help btw

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I also lost my IMEI no after a flashing a rom, as far as I was aware I had never made a backup of my efs folder, I attempted many different methods to resolve this, then I checked my external SD storage and saw an EFS_BACKUP folder with numerous compressed EFS files, I simply selected one of the early ones copied to my desktop and extracted contents and used them to replace my current efs folder on root of the phone, then reboot and you should have your original IMEI and phone working again, hope this helps goodluck

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strictly.mobile said:
I also lost my IMEI no after a flashing a rom, as far as I was aware I had never made a backup of my efs folder, I attempted many different methods to resolve this, then I checked my external SD storage and saw an EFS_BACKUP folder with numerous compressed EFS files, I simply selected one of the early ones copied to my desktop and extracted contents and used them to replace my current efs folder on root of the phone, then reboot and you should have your original IMEI and phone working again, hope this helps goodluck
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yeh i know, but see thats not the problem. There is a million posts on that and i wouldnt have made another thread. The imei number will be there, and everything will be working, i'll restart my phone, it'll go away, i'll restore using GSII_repair, it'll come back sometimes, sometimes it wont, i just restart my phone untill it does but as soon as i restart it again, it'll say unknown. its a weird problem i know but im hoping someone has the answer to it

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rohin26 said:
just restarted my phone and checked, the imei number is showing. i didnt have to restore or anything. Is it safe to flash a ROM now? or any risk of brick? thanks for your help btw
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Yes you can go ahead with flashing stuff

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rohin26 said:
yeh i know, but see thats not the problem. There is a million posts on that and i wouldnt have made another thread. The imei number will be there, and everything will be working, i'll restart my phone, it'll go away, i'll restore using GSII_repair, it'll come back sometimes, sometimes it wont, i just restart my phone untill it does but as soon as i restart it again, it'll say unknown. its a weird problem i know but im hoping someone has the answer to it
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I get your point but with your IMEI coming and going, it would point too corrupt efs files on the root of your phone, given you have tried various methods already, I would take a copy of the suspected corrupt efs folder save it onto your pc, then go back to the root folder and delete it, replacing it with one from your EFS_backup folder on your external SD, no need to edit any of the internal files or use any other software, simply reboot

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strictly.mobile said:
I get your point but with your IMEI coming and going, it would point too corrupt efs files on the root of your phone, given you have tried various methods already, I would take a copy of the suspected corrupt efs folder save it onto your pc, then go back to the root folder and delete it, replacing it with one from your EFS_backup folder on your external SD, no need to edit any of the internal files or use any other software, simply reboot
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But do note down the permissions of the folder. You will need to set the same after pasting. Use Root Explorer for replacement purpose.
Sent from my GT-I9100 using xda premium

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shahrozeumar said:
But do note down the permissions of the folder. You will need to set the same after pasting. Use Root Explorer for replacement purpose.
Sent from my GT-I9100 using xda premium
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Good call, yes you will need root explorer and after pasting my permissions were already set but its best to make a note too be sure

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Just backup your phone using galaxy toolbox and restore it
It can restore your IMEI
Hope it can help
Sent from my GT-S5360 using Xparent Skyblue Tapatalk 2

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strictly.mobile said:
I get your point but with your IMEI coming and going, it would point too corrupt efs files on the root of your phone, given you have tried various methods already, I would take a copy of the suspected corrupt efs folder save it onto your pc, then go back to the root folder and delete it, replacing it with one from your EFS_backup folder on your external SD, no need to edit any of the internal files or use any other software, simply reboot
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i have root access and everything but it wont let me delete the efs folder, keeps saying its only readable...