Database Develop

[Q] No network/service over Onecosmic ICS 4.2

Hi,
I am on Onecosmic 3.1, I tried flashing 4.2, after flashing 4.2 I lost phone signal, it is saying No Service. Again I went back to old 3.1 version, no problem with signal.
So, Please help what should I do to flash 4.2 version on my phone.
Edited: Thanks everyone, I made it work flashing different modem.
Thanks in Advance,
Ajay

Check imei number. Version 4.1 & 4.2 have been corrupting imei number which causes no network
Sent from my GT-P7500 using xda premium

Hmm, for me, in ICSSGS 4.2, I do have phone signal and full service, however, when I pull down my Notification bar, it displays "No service.", which, fortunately, is a lie

Thanks for reply,
So is there any solution for this?
Thanks,
Ajay

I'm a semi noob at the technical stuff, but I seem to remember that this issue can be solved by restoring the backup you have surely made of your EFS folder . This folder contains all the info about your carrier and such.
If you don't have a backup of your EFS folder, I cannot help you with my limited knowledge

Follow these at your own risk or search the forums for a more thorough explanation.
If you have made a backup use something like root explorer to look for the EFS folder in the backup & copy the two files nv_data.bin & nv_data.bin.md5. Now go to the EFS folder on the phone & paste over these to files replacing them with your backups. You can then delete nv.log, .nv_data.bak & nv_data.bak.md5. Or that is what I did and it worked.
If you did not make a backup then you would need to flash a stock rom which usually does the trick (all three files). As your IMEI appears to be fine in v3.1 I would make a backup of 3.1 & use those files. You could also copy the two files out of the efs folder and place them in your root directory then after installing 4.2 just replace the files with the ones you copied.

ajay_lanki said:
Hi,
I am on Onecosmic 3.1, I tried flashing 4.2, after flashing 4.2 I lost phone signal, it is saying No Service. Again I went back to old 3.1 version, no problem with signal.
So, Please help what should I do to flash 4.2 version on my phone.
Thanks in Advance,
Ajay
Click to expand...
Click to collapse
Many pepole who flashed RC4.1 experienced this problem, its due to the IMEI being changed to some default value. this can be fixed if you had backed up your efs folder, if not you have to reflash the official gingerbread then copy the efs folder using ROOT EXPLORER, this will fix the corrupted IMEI issue. This issue has been fixed in RC4.2 so after you get your IMEI fixed, flash RC4.2.
Sent from my GT-I9000 using xda premium

Thanks for your reply.
I will try this and let you know the result. Thanks once again.
-Ajay

I seem to have the same problem, sometimes my phone reboots, and radio is gone. When I check, IMEI-N° isn't displayed, but after some reboots its back.
I did back up the EFS Folder, but how can I stop this from happening on a regular basis?
Regards

lemalsaint said:
I seem to have the same problem, sometimes my phone reboots, and radio is gone. When I check, IMEI-N° isn't displayed, but after some reboots its back.
I did back up the EFS Folder, but how can I stop this from happening on a regular basis?
Regards
Click to expand...
Click to collapse
If you restored your EFS backup it should be ok...but since is happening many times...you can reflash a stock firmware and then flash again your current ROM.

BoBoGrEy said:
If you restored your EFS backup it should be ok...but since is happening many times...you can reflash a stock firmware and then flash again your current ROM.
Click to expand...
Click to collapse
By "backing up" you mean just copy/paste it to the respective folder?

Hello guys. This happened to me as well with onecosmic ICS RC4.2. Will be lashing back stock GB fw as I do not have an efs backup

Hi,
I have tried flashing 4.2 again and checked IEMI number, no change in IEMI number but no Network. It is saying Emergency Calls.
My phone works only in Rc1 or 3.1.
Please help me what should I do, I dont have efs backup.
Thanks,
Ajay

Hi ajay_lanki
the latest Team ICSSGS Build has a script to fix efs folder permission, which should solve the problem. Threat:
http://forum.xda-developers.com/showthread.php?t=1398223
I didn't read through the comments though, can't tell if it works!
Cheers

scubadude said:
Follow these at your own risk or search the forums for a more thorough explanation.
If you have made a backup use something like root explorer to look for the EFS folder in the backup & copy the two files nv_data.bin & nv_data.bin.md5. Now go to the EFS folder on the phone & paste over these to files replacing them with your backups. You can then delete nv.log, .nv_data.bak & nv_data.bak.md5. Or that is what I did and it worked.
If you did not make a backup then you would need to flash a stock rom which usually does the trick (all three files). As your IMEI appears to be fine in v3.1 I would make a backup of 3.1 & use those files. You could also copy the two files out of the efs folder and place them in your root directory then after installing 4.2 just replace the files with the ones you copied.
Click to expand...
Click to collapse
I have tried this, but no luck. Please help me if there is any other way.
Thanks,
Ajay

Sorry fairly new to all of this. If what I did doesn't work for you I can't help. Hopefully someone else can
The next best thing would be to flash a stock Rom of gingerbread and start again
Sent from my GT-P7500 using xda premium

First: RC4.2 doesn't solve IMEI issue, i had it with 4.1, resotred efs, it worked, flashed 4.2, and issue again.
Second: The best way to restore /efs backup is going into /efs BACKUP (not original), multiselect every file, copy, and paste in ACTUAL /efs folder. Then reboot and that's it. If no /efs backup was ever made, the only way to solve imei loss is to go back to a stock rom (wich makes your imei come back), backup /efs from there and go ahead with ICSSGS again.

fps249 said:
First: RC4.2 doesn't solve IMEI issue, i had it with 4.1, resotred efs, it worked, flashed 4.2, and issue again.
Second: The best way to restore /efs backup is going into /efs BACKUP (not original), multiselect every file, copy, and paste in ACTUAL /efs folder. Then reboot and that's it. If no /efs backup was ever made, the only way to solve imei loss is to go back to a stock rom (wich makes your imei come back), backup /efs from there and go ahead with ICSSGS again.
Click to expand...
Click to collapse
scubadude said:
Sorry fairly new to all of this. If what I did doesn't work for you I can't help. Hopefully someone else can
The next best thing would be to flash a stock Rom of gingerbread and start again
Sent from my GT-P7500 using xda premium
Click to expand...
Click to collapse
ajay_lanki said:
I have tried this, but no luck. Please help me if there is any other way.
Thanks,
Ajay
Click to expand...
Click to collapse
ajay_lanki said:
Hi,
I am on Onecosmic 3.1, I tried flashing 4.2, after flashing 4.2 I lost phone signal, it is saying No Service. Again I went back to old 3.1 version, no problem with signal.
So, Please help what should I do to flash 4.2 version on my phone.
Edited: Thanks everyone, I made it work flashing different modem.
Thanks in Advance,
Ajay
Click to expand...
Click to collapse
I've had the same issue. No matter how many times you re-flash the ROM and do FULL wipe, I wont change anything, because FULL wipe is not really "FULL", neither is Factory reset etc. For some reason it needs a "real-FULL-wipe" (Just something I made lol). Anyway you can do it following these steps:
1. Flash an NONE ICS based ROM, say JVU stock ROM .(Download it from Sammobile.com, go into download mode, and flash it using Odin 1.85 with 512 pit file)
(You are on a Stock JVU ROM now)
2. ROOT you JVU ROM. (Any method is fine but I prefer flashing Semphore kernel using Odin, just download the kernel from here, go into download mode, and put the kernel in PDA section and flash, no pit files needed for this).
(You are on a ROOTed Stock JVU ROM now)
3. Flash CM7 stock ROM. (Download CM7 stable version not a nightly version from their website, copy it to your INTERNAL SD Card, go into CWM and flash. If you had issues there just re-flash).
(You are on a stable version of CM7 that is already Pre-rooted)
4. Flash Onecosmic 4.2. (Download it, copy it to INTERNAL SD Card, go into CWM and flash, sometimes it gets stuck on a boot loop or on logo screen, go into CWM using the three buttons combo :Volume up button + Power + Home key. Once you're in CWM re-flash it again.
Do this and I will guarantee that it will solve ANY problem you or anyone else have with Onecosmic ICS 4.2.
Only problem you may encounter with the ROM is External SD card issues, which is caused by either the ROM itself or your own SD card.
A >> "thank you" would be nice . Have a good one.

Won't boot after flashing DerTeufel'S [ROM] Jellybean [4.1.1]

Hello,
I tried searching for my problem in the forums but I didn't find my exact setup and don't want to brick my phone. (Well maybe it already is)
I had Cyanogenmod 7 for quite a while and tried the Nightlies for 9 some months ago. In the early days of my phone I used ODIN to flash the newest Stock firmwares and then used the chroot kernel to root my phone and install cwm. Since then I installed Cyanogenmod 7 and later Cyanogenmod 9 Nightlies with cwm recover and there was never a problem.
Today I tried the ROM from DerTeufel1980 http://forum.xda-developers.com/showthread.php?p=28819140
I flashed the rom, the addons, the superuser and google now fix. Then I flashed the kernel Devil3_1.0.0-Rc5_datadata_i9000_CFS_BLN_CMC_20120719.zip and fixed permissions. After that my phone wouldn't boot. The boot animation was the old standard android logo.
I managed to get into Devil Kernel Recovery and thought to try a reflash of just the ROM but when I try to "choose a zip" it always tells me
E:can't mount /sdcard/
After that I flashed the kernel with odin and now the phone seems to boot but veeeery slow and it has a ton of flickering the whole time. The bootanimation is the cyanogenmod 9 boot animation. I got into Devil Recovery and I still can't mount the sdcard. And it seems that it doesn't detect my sim card.
I hope you can help me.
Edit: Actually after rebooting several times the boot sped up and I could get into the ROM. I still can't mount the internal sdcard though and I have no phone functionality. It seems that my IMEI number is gone.

Hey
Downgrade your sgs to 2.3.6 valuepack using odin3...
Then root it and use it for a day atleast..
Then flash CM9 nightly..use that for a day too..
Then flash JB...not the same one u did earlier..
Instead Goto teamjellybean.noez.in (ad www.)
Find d latest version of jb and follow the instruction there..
Cheers
Sent from my GT-I9000 using xda app-developers app

Thanks that's exactly what I have done and it worked.

I've seen a lot of folks saying that they might have bricked their phones when some issue occured while flashing a new rom.
Personally whenever I face issues, I just goto the Download mode and Flash a GB rom and then move my way up (GB --> ICS --> JB).
As long as you can go into Download mode, shouldnt be a problem

Fwiw, I lost my IMEI for the first time trying out the JBs. Not sure if it was Slim or DerTeufel's. I ended up with the kind that allows you to connect to your mobile provider, a fake but working IMEI. But when I saw that I tried to go to GB and it didn't come back automagically. And the IMEI was totally wiped so I couldn't even register on the network. Ended up getting to ICS and only then did Root Browser let me write to the efs folder.
Lesson, in short: make a backup zip of your efs folder (to preserve permissions) and double back it up using Nitrality from the Play store.
Glad you got yours back, too.
sent from a telephonic device

tchindalia said:
Hey
Downgrade your sgs to 2.3.6 valuepack using odin3...
Then root it and use it for a day atleast..
Then flash CM9 nightly..use that for a day too..
Then flash JB...not the same one u did earlier..
Click to expand...
Click to collapse
OK, so I'm *definitely* a crappy speed-reader, because I missed this part about waiting on each version. What does the waiting do? I'm now wondering if that means I need to use the phone and, with the restored /efs folder, sometimes later /dev/block/stl3 will repopulate itself with the proper info.

Hey
I asked to wait on roms coz it can just make a few things working...like data..if it doesnt work on 1 rom it would not (probably) work on the next update..(personal experience)..
Cheers
If my post helped, don't mind hitting the Thanks button..

[Q] ESF Issue after putting on 4.2.2

Hello,
New here and hoping someone can help me with my problem.
I've got an AT&T Captivate i897 that I put Jelly Bean on. The first time I did it, I didn't do the efs back up (the directions that I followed never mentioned it). This caused my phone to have a generic IMEI. After doing some digging, I found out that returning it to the stock GB 2.3.5 would put the correct IMEI back on the phone. I did this, and it did. I did a back up using EFS Pro 1.9.12. I then went back to Jelly Bean, hoping I could do a restore and all would be well. Unfortunately, this is where I am stuck.
EFS Pro 1.9.12 doesn't recognize the phone when I plug it in. I got the newer 2.0.26 version. This recognized the phone, but there was nothing for it to restore. I also tried using a root manager app, but there was no efs folder in there for me to put the back up in to.
If anyone could help, that would be a huuuuge help.
Thanks

If there was no efs folder, should just be able to make one and put the files inside. It's odd this only happens for some people, when I updated to 4.2.2 everything worked fine for me no efs backup etc.
But try putting the folder there anyway, reboot into recovery, fix perms, reboot. Might work (idk I've never had this problem, but putting the required files where they should be and letting the phone fix the permissions should help)

CM10 is the base of most custom ROMs. From stock (rooted and with CWM) flash CM10 and you'll see a backup of your original EFS folder on your internal SD. Check your IMEI in CM10, if good go ahead and flash your favorite JB ROM. Many custom JB ROM's require CM10 flash anyway (to create needed JB file system).

x0ne215 said:
If there was no efs folder, should just be able to make one and put the files inside. It's odd this only happens for some people, when I updated to 4.2.2 everything worked fine for me no efs backup etc.
But try putting the folder there anyway, reboot into recovery, fix perms, reboot. Might work (idk I've never had this problem, but putting the required files where they should be and letting the phone fix the permissions should help)
Click to expand...
Click to collapse
Tried this.. I think. When I plug the phone in and turn it on as mass storge, I get an F drive and a G drive. G seems to have all of the phone info on there, so I just create a folder G:/efs and unrar the backup into that?
Val D. said:
CM10 is the base of most custom ROMs. From stock (rooted and with CWM) flash CM10 and you'll see a backup of your original EFS folder on your internal SD. Check your IMEI in CM10, if good go ahead and flash your favorite JB ROM. Many custom JB ROM's require CM10 flash anyway (to create needed JB file system).
Click to expand...
Click to collapse
I used CM10 to put JB on but I don't see a back up of my original EFS.

ice_w0lf said:
Tried this.. I think. When I plug the phone in and turn it on as mass storge, I get an F drive and a G drive. G seems to have all of the phone info on there, so I just create a folder G:/efs and unrar the backup into that?
I used CM10 to put JB on but I don't see a back up of my original EFS.
Click to expand...
Click to collapse
Which ever drive is the internal sd, if you can't tell put a folder on your EXTERNAL SD named blah and which ever drive doesn't have it is the external. You also fixed the permissions after placing the folder? If it isn't properly chmod'ed, the phone may not recognize it's existence or be able to access it. Once you put the folder on the internal sd, boot into recovery and fix permissions.
Tell me how it goes.

x0ne215 said:
Which ever drive is the internal sd, if you can't tell put a folder on your EXTERNAL SD named blah and which ever drive doesn't have it is the external. You also fixed the permissions after placing the folder? If it isn't properly chmod'ed, the phone may not recognize it's existence or be able to access it. Once you put the folder on the internal sd, boot into recovery and fix permissions.
Tell me how it goes.
Click to expand...
Click to collapse
Ok, here is what I have...
G:/ was my internal sd. So I created G:/efs with my unrar'd back up put into that folder (I'd post a pic, but I'm still under the 10 post rule).
I then reboot the phone into recovery mode, went to advanced, and hit fix permissions. That did its thing, and then I rebooted the system. Checked the phone data and it still has the wrong IMEI.
I'm wondering if at this point I should just wipe it all, return to stock GB, do a back up again (any suggestions for something other than EFS-Pro for backup/restore?), and then put CWM+CM 4.2.2 back on and do a restore.

/efs is a folder in root, not in your storage. Need to use root explorer. Better go to stock to restore your IMEI.

Val D. said:
/efs is a folder in root, not in your storage. Need to use root explorer. Better go to stock to restore your IMEI.
Click to expand...
Click to collapse
Why not just put it in storage then just copy it to root with root explorer? Less work no need to reflash.

I know, but OP is not very confident what to do. Also, just restoring /efs very often won't restore phone's IMEI. The easiest and guaranteed method for him is back to stock.

Ok.. some success! I returned it to stock, did a back up, put the mod back on.. and now I've got the correct IMEI :good:
Now I am trying to take the AT&T sim card from the gophone that I bought so that I wasn't cut off from the world (the phone worked on my contract with my contract number) and put it into the Captivate, and I get Emergency Calls Only. I go into status and I get:
Network: Unknown
Service State: Out of Service
Mobile Network State: Disconnected
My phone number: Unknown
I'm guessing at this point that I just need a new sim card?
Also, thanks for all of the help so far.

Can you try this SIM on another AT&T phone?
What exactly JB ROM you flashed after stock ROM?

Val D. said:
Can you try this SIM on another AT&T phone?
What exactly JB ROM you flashed after stock ROM?
Click to expand...
Click to collapse
SIM works in another AT&T phone (Alcatel OT-510A to be exact).
I used the [NIGHTLY][ROM][4.2.2] CyanogenMod 10.1 for Samsung Captivate right from the Captivate Android Development thread.

Hmm... check what modem (baseband) version you have in Settings>About Phone. With CM10.1 it must be I9000UGKG3, I think.

Val D. said:
Hmm... check what modem (baseband) version you have in Settings>About Phone. With CM10.1 it must be I9000UGKG3, I think.
Click to expand...
Click to collapse
I have I9000UGKG3

Did you try this phone on stock ROM? Was it working with no issues? I'm out of ideas...

I'm not sure about the gophone sim, but glad to hear you got the other one working . Is your contract provider AT&T as well? If not probably would need to be unlocked for use with AT&T.

anyone else think this should be over in q/a forum

bit lost in "new i9305 what now" thread

I was following this thread here: [IMPORTANT][GUIDE] What to do after you have bought your Galaxy S3 4G GT-I9305? and I got a bit lost in part 6.
I've done following:
1. Kies and drivers and on PC
2. IMEI/NV backed up on PC (USB modes set forth and back)
3.-4. Rooted and CWM recovery installed
5. Nandroid backup taken on external SD
6. Soo I got my backups secured in 2 locations..but what now?.. It says I have to go to part 2 and continue where I left off?
quote:
"Remember where you left off in 2nd step above? Well now you can go back and complete the partition backup of the efs folders. You should be left with 4 backup files for this final section of the backup process >>> http://splashurl.com/o7hwdsr"
But there is no mention of efs folders in part 2-link. I'm confused. I'm not native english speaker, so that messes up things sometimes.
BTW I did install Cerberus ROM at some point (Don't ask me why. Love the features, but don't know if there's any benefit it being flashed).
So I'm Rooted, CWMed and installed Cerberus ROM. I guess I have no stock ROM anymore?
And last: Is there a place you can search stock ROMs?
Edit #X: I found stock rom for what I have in phone. Galaxy S 3 LTE GT-I9305 I9305XXBMI3 Android 4.1.2

trigsu said:
I was following this thread here: [IMPORTANT][GUIDE] What to do after you have bought your Galaxy S3 4G GT-I9305? and I got a bit lost in part 6.
I've done following:
1. Kies and drivers and on PC
2. IMEI/NV backed up on PC (USB modes set forth and back)
3.-4. Rooted and CWM recovery installed
5. Nandroid backup taken on external SD
6. Soo I got my backups secured in 2 locations..but what now?.. It says I have to go to part 2 and continue where I left off?
quote:
"Remember where you left off in 2nd step above? Well now you can go back and complete the partition backup of the efs folders. You should be left with 4 backup files for this final section of the backup process >>> http://splashurl.com/o7hwdsr"
But there is no mention of efs folders in part 2-link. I'm confused. I'm not native english speaker, so that messes up things sometimes.
BTW I did install Cerberus ROM at some point (Don't ask me why. Love the features, but don't know if there's any benefit it being flashed).
So I'm Rooted, CWMed and installed Cerberus ROM. I guess I have no stock ROM anymore?
And last: Is there a place you can search stock ROMs?
Edit #X: I found stock rom for what I have in phone. Galaxy S 3 LTE GT-I9305 I9305XXBMI3 Android 4.1.2
Click to expand...
Click to collapse
My first language is English and I didn't quite get it either. But following all the steps gave me nandroid backup and i think the qcn file is good enough for you to restore. seeing as you managed to flash a rom I guess you're all good. I was following the steps too and after I didn't get that part I just went ahead and flashed ROM, had no problems, maybe it was an edit error and guide maker forgot to add in something?

Difficult but reads as backup EFS to me and its no harm to have more than one backup .
So I'm Rooted, CWMed and installed Cerberus ROM. I guess I have no stock ROM anymore?
Correct.

JJEgan said:
Difficult but reads as backup EFS to me and its no harm to have more than one backup .
So I'm Rooted, CWMed and installed Cerberus ROM. I guess I have no stock ROM anymore?
Correct.
Click to expand...
Click to collapse
Would have I been stock ROM without cerberus ROM flashed?

EFS folder/IMEI problem

Hi everyone,this is my first post here on xda but i have been observing and following XDA forum for quite a while now,
Now recently I tried to install Origional CM10.2,
Steps i followed were
I had 2.3.4 ( i did installed CM9 almost an year back but then odin back to stock for reasons i dont remember now)
First i Flashed Speedmod kernel via odin 1.7, and then flashed glitch kernel zip using the recovery that came the speedmod kernel,
Wiped devlik cache and went on to install CM10.2,
Everything went fine till i noticed that i was not getting any reception and after googling a bit,identified the problem as efs folder corruption!
I immedietly flashed back to 2.3.4 using oddin and that solved the problem, and my fone was getting the signals on stock 2.3.4,
Following instructions from google, I used EFS recovery softwere to backup my EFS folder,
and then followed the same sequence to flash again to 10.2CM, but here come the tricky part, EFS pro didnt seem to work on CM10.2, i have everything installed perfectly, debugging mode is on, still cant get to restore the efs folder!
I even tried manually copying the backed up EFS folder and putting it in system folder using root explorer etc,but that didnt seem to work, I changed the permission to Read/write aswell, still it says operation failed!
EFS pro was my best hope but it just doesnt work, tried a newer verison of it(newer than the one that i used to backup the efc on GB),that opened but didnt have my device in supported list,and neither was showing any backup!!
This is what i have been doing for past two days
Now I am back to 2.3.4,and IMEI is working fine now.
and additionally just to check whether this happens only on cm10.2 or other versions as well, I flashed Cm10.1 aswell as cm9, same problem there aswell
(As far as i remember ,last year when i flashed CM9,it worked fine but was laggy so i flashed back,only thing i did differently was that i didnt install any kernel)
So any ideas how i should proceed now?
I would thankful if someone can help me ,
and sorry for the long story,i wanted to give as much precise info abt problem as possible!

MUBASHIR888 said:
Hi everyone,this is my first post here on xda but i have been observing and following XDA forum for quite a while now,
Now recently I tried to install Origional CM10.2,
Steps i followed were
I had 2.3.4 ( i did installed CM9 almost an year back but then odin back to stock for reasons i dont remember now)
First i Flashed Speedmod kernel via odin 1.7, and then flashed glitch kernel zip using the recovery that came the speedmod kernel,
Wiped devlik cache and went on to install CM10.2,
Everything went fine till i noticed that i was not getting any reception and after googling a bit,identified the problem as efs folder corruption!
I immedietly flashed back to 2.3.4 using oddin and that solved the problem, and my fone was getting the signals on stock 2.3.4,
Following instructions from google, I used EFS recovery softwere to backup my EFS folder,
and then followed the same sequence to flash again to 10.2CM, but here come the tricky part, EFS pro didnt seem to work on CM10.2, i have everything installed perfectly, debugging mode is on, still cant get to restore the efs folder!
I even tried manually copying the backed up EFS folder and putting it in system folder using root explorer etc,but that didnt seem to work, I changed the permission to Read/write aswell, still it says operation failed!
EFS pro was my best hope but it just doesnt work, tried a newer verison of it(newer than the one that i used to backup the efc on GB),that opened but didnt have my device in supported list,and neither was showing any backup!!
This is what i have been doing for past two days
Now I am back to 2.3.4,and IMEI is working fine now.
and additionally just to check whether this happens only on cm10.2 or other versions as well, I flashed Cm10.1 aswell as cm9, same problem there aswell
(As far as i remember ,last year when i flashed CM9,it worked fine but was laggy so i flashed back,only thing i did differently was that i didnt install any kernel)
So any ideas how i should proceed now?
I would thankful if someone can help me ,
and sorry for the long story,i wanted to give as much precise info abt problem as possible!
Click to expand...
Click to collapse
Were you rooted when you tried to manually restore your efs folder? It should let you change it if you have the right permissions.
I would try to make a manual backup of your efs folder while you're on stock GB and try it again on the ROM you wanna use if you lose your IMEI again. Perhaps try another ROM as well, see if you get the same issue.

I have had problems with losing my imei after flashing to cm10 variants as well. In the steps that I took in this video I didn't lose it and I haven't had anybody else report that they have in the comments.
https://www.youtube.com/watch?v=_hmck9ES6jM

BWolf56 said:
Were you rooted when you tried to manually restore your efs folder? It should let you change it if you have the right permissions.
I would try to make a manual backup of your efs folder while you're on stock GB and try it again on the ROM you wanna use if you lose your IMEI again. Perhaps try another ROM as well, see if you get the same issue.
Click to expand...
Click to collapse
Arent Cyanogen Mods are already rooted?
I used the File explorer that was included in CM10'.2 and in settings i changed its permissions to ROOT ACCES.
Still i cant copy anything to EFS folder.
To be on the safe side,i tried Rooting Cm10..2 with Vroot,one click softwere and it showed that my phone had root Permissions!
Still I CANT WRITE ANYTHING WITHIN SYSTEM FOLDER,root explorer says that I dont have Root permissions, even after i rooted with Vroot!
I am confused

MUBASHIR888 said:
Arent Cyanogen Mods are already rooted?
I used the File explorer that was included in CM10'.2 and in settings i changed its permissions to ROOT ACCES.
Still i cant copy anything to EFS folder.
To be on the safe side,i tried Rooting Cm10..2 with Vroot,one click softwere and it showed that my phone had root Permissions!
Still I CANT WRITE ANYTHING WITHIN SYSTEM FOLDER,root explorer says that I dont have Root permissions, even after i rooted with Vroot!
I am confused
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I would suggest trying with another file explorer. There are many on the Play Store (I personally like Root Explorer but there are free options).