yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] Ajsk:
Try downloading and instaling your original rom! If your EFS folder not too much corrupted like mine, you should get your stock firmware installed and all runing as it was. Try this: forum.gsmhosting.com/vbb/archive/t-1505189.html

---------- Post added at 09:55 AM ---------- Previous post was at 09:48 AM ----------

made a recovery from cwm mode, went to efs and deleted it. After booting up, i still have no imei, no sim detected, when i press power button no of sceen log no more, just straight reboot. And a message on screen that does not go nowhere see screenshot.

---------- Post added at 10:13 AM ---------- Previous post was at 09:55 AM ----------

[/COLOR]

Thank allot mate, allot of useful information, I have checked my EFS folder with root explorer. HC-kTool dos not support my device SHV-E250S, so i can’t use it, made my recovery in CWM. For now can`t get my imei back.((( But still thank you for information!

---------- Post added at 10:23 AM ---------- Previous post was at 10:13 AM ----------

So, tried to use the recovery i made, it let me get root back hopefully, but it did nothing to my EFS folder. Even recovery i have made before deleting EFS couldn’t help me((( I still have the same message window on the screen, and when i turn the phone on after a no battery night, it says that phone is in factory settings now (something like that).
[Galaxy S II General] sabkt:
IMEI

Dear, I am haing same problem but my phone was neither rooted nor i loaded it strange applecations and games, it was almost as it came from co but suddenly i lost signals ( no service) i thought may be something went wrong with hardware and i took it to a workshop , and they told me its IMEI problem , and they do not fix software issues..also it started killing battery and went dead. i installed original software again but it didnt change anything except its working absolutely fine but still no IMEI , now i have rooted my phone but still i dont know what to do and how..i have box available so i have IMEI but how to write it in system ( my phone is a unlocked phone ..
[Galaxy S II General] gadapxichlo:
Thank you very much!
[Galaxy S II General] BlkR:
Hey guys, seems the problem when i followed those procedures is checksum info... after following those procedures nothing happen so i checked the log file and it has the following:

fail - no checksum info

default NV restored

any help guys ?>
[Galaxy S II General] tylerdurden83:
I tried to follow these steps, but there is a problem, I have no .nv_data files in the /efs folder. Can I still do something about it?
[Galaxy S II General] ganesh8586:
Will this work on galaxy y?i flash with other custom rom now iam back to original ron but my imei just 00000000 isthere can do anything with CWM back to get back imei.....
[Galaxy S II General] angel.a:
risks?

Hi,

My Galaxy nexus lost its original IMEI at some point. I a backup of the /factory directory, which I guess is the GNex equivalent of ESF (it seems to have roughly the same contents). I'd like to restore my IMEI, but not if there is a significant risk of losing connectivity. What is the risk in this procedure?
[Galaxy S II General] Diodio26:
"3) reset the phone, after that, go to the root, and you can see that the EFS folder is still there, don't make any mistake, this EFS folder is new and generated by the android OS."

I'm stuck in this step.

When I try to delete the EFS folder it says "delete failed". The folder stays there, but all the content gets deleted.

After I reboot the phone there's no files on the folder. No "nv_data.bin", "nv_data.bin.md5". So I can't delete them to continue step 4.

The following appears after I reboot on the EFS folder.

.files

cryptrop_applied_result

cryptprop_essiv

cryptprop_onetimeboot

cryptrop_securewipedata

dmp

Those are "folders".

Please help.
[Galaxy S II General] ganesh8586:
from galaxy y my efs folder is empty.....what i can do now?
[Galaxy S II General] Yorkshire_Chris:
This happened to me when I flashed my second ROM (CM9); this post saved me a lot of hassle.

Thank you.
[Galaxy S II General] bilbonotry:
Unfortunately CWM nandroid backup does not seem to backup /efs, I had the same issue when trying to get rid of simlock.
[Galaxy S II General] fakhersidhu:
thanks for this :) I might have to use this later.....
[Galaxy S II General] saqi4you:
ok let me check i have 3 S2 with unkown Basband and IMEI

let see if work for me
[Galaxy S II General] kofijay:
Any Idea How To Do This On S3 I9300?

Insightful ...I'm sure if I were on S2 I would be a happy man by now but unfortunately I am on S3 I9300 and can't find my head around this. I don't know how where to start or how even begin as I don't have any folder called IMEI. Does S3 have same files as S2 in the EFS folder?

HELP! :eek:
[Galaxy S II General] grandnoise:
NOOB POST BEWARE

I seem to have another imei problem

Same as many, no imei/baseband etc.

no network recognized.

Phone is a Galaxy s2 I19100

I had my phone for about a month when the signal went for no apparent reason (had not rooted the phone or installed any custom software, only apps from play store)and the above problems started. I sent it off to Tmobile who screened it and got it working again, then when they returned it I re-installed the backup which cause the problem again, this time rather than waiting for tmobile to fix it I tried myself, unsuccessfully. I sent it off with a stock rom installed but tmobile realised it had been rooted and refused to repair it.

Does anyone have any information on getting my phone working again?

I have tried gs2 repair and efs pro and have not had any luck.

Any help would be greatly appreciated.
[Galaxy S II General] zeili:
Hello,

i don't have the .nv_data file! What now??

Greets Ronny
[Galaxy S II General] cupidchild:
Same here I do not see .nv_data file and tried to just do it with nv_data.bin & md5 file but no good.
[Galaxy S II General] gerrard00:
new motherboard = blank imei value?

hello, I haven't seen anyone actually asking this, so here it goes... I just changed my motherboard, my i9100 was down cause of the emmc brickbug, I got a new motherboard (or so my repair guy says) and everything was just fine the first time they turned on the phone, wifi do work, so do gps and bluetooth, no visible flaw was encountered, then I asked the guy from the repair shop to test my device on a phone call, it did not recognize any sim from my service provider, i didn't back up my efs folder on other place, just in my internal memory of the phone. my doubt is, does the new motherboard has anything to do with this specific issue? new motherboard equals to a blank imei value? sorry if this is some sort of noob question, but I'd like to know if anyone is going through the same thing.

I've managed to run CM9 and I do get "unknown" baseband and a blank imei number, every time i roll back to stock (GB 2.3.4) my baseband is actually there, my imei number is still missing. I can't seem to find a proper way to bring back my imei number, i didn't back up my efs prior to this, and I don't have those ".bin" files, mine are ".bak"

I do have a efs/imei folder but the specific files required for this thread are not available to me on my device.

GS II Repair by hellroz doesn't work since some required files are missing, I don't remember which ones right now..

any help will be appreciated, thanks!
[Galaxy S II General] sangram.takmoge:
on Samsung Galaxy devices use KTool app by HellCat

This is a tool for a few functions after rooting. Kernel dump/flash, EFS backup/restore...

/!\ Requires Root /!\
[Galaxy S II General] cactusdragos:
imei change in 004999010640000/01

I flash my GS2 with Jelly Bean 4.1.2, after that the phone was networck locked, I deleted nv_data.bin and nv_data.md5(My mistake I did not backup), but everything was ok, the phone works fine, but the imei is change to 004999010640000/01.I dont have original efs backup, and i never found''. nv_data '',i find just .nv_data.bak ,.nv_data.bak.md5 and nv_data.bin,nv_data.bin.md5.

I tried every day without hope...i m tired.

Someone help me,plz.
[Galaxy S II General] ditech50:
I'm so grateful for the instructions
[Galaxy S II General] ahernandez4110:
Thank You for your guide, but in my case I dont see the nv_data.bin or the nv_data.bin.bak on efs folder all i see is imei

Thanks
[Galaxy S II General] cactusdragos:
imei change in 004999010640000/01

Me too,i have all file in EFS folder,only ''.nv_data'' is missing.
[Galaxy S II General] tsch67hag:
Help

Hello

I am in the same situation.

No IMEI, no baseband.

I tried all the steps described in this post and others. But nothing works, both fields are empty!

Is the SAMSUNG service can 100% solve this problem?

With regard to those who were in the same case, did you find a phone that works?
[Galaxy S II General] ravi6104:
help

i have flashed my rom n kernel to install slimbean....

but now no network coverage as well as imei n all showning me unknown...

please help me
[Galaxy S II General] Paulexus:
same problem here

I have the same problem as you have. My phone has no IMEI and no Baseband. I tried the steps above with no luck. So I brought my phone to the Samsung service center and the only solution to the problem is for me to replace the motherboard of my phone (Galaxy SL i9003) which is 80% of the price of the phone! I said to them HELL NO!!!!
[Galaxy S II General] irawanjohan:
It happened to me too, and Samsung center in my country changed the logic board for $150
[Galaxy S II General] Harsher:
Hello Guys,

for all of you who don't have a "nv_data.bin", or ".nv_data.bin", first, check that your file manager displays hidden files.

If it is, then the files are not here. so that mean that if you delete EFS partition

and it is restored under a bad form, then your mmcblk0p1 file in /dev/block/

is certainly not functional.

Then you have to first use the files in this thread:

http://forum.samdroid.net/f70/repair-imei-s2-5729/

There is a "Ilostit.dd" file that you can use to repair your EFS partition (that is explained inside it,

but roughtly, you have to use it to replace mmcblk0p1 file (save it before!) with some adb command

-that is not copy paste operation, read through the link)

then delete the unfunctional EFS partition,

-DON'T DELETE THIS UNLESS YOU ARE SURE THAT mmcblk0p1 HAS BEEN FIXED OR IS CORRECT

then reboot, the EFS should be repaired but generic,

and then to repair your nv_data bin for it to be "yours" again, well

use this link to edit Hex of the nv_data.bin.

http://xdaforums.com/showthread.php?t=881162

It is a composite method and I used some variant of it to repair my phone,

it worked but you could maybe meet some problem.

Then, my advice is to think slowly about what to do.

Eventually you can buy the service of the guy who made the thread of the first link,

but mostly if there is something still working on your phone you can repair it with this

method or some adjustments (I can't make a better tutorial for now because I made one

but wait for some tech friends of mine to validate it, as most things are adaptations of my

own of different methods found on the web)
[Galaxy S II General] friendlynandy:
got same problem.went to samsung care they sugested to replace motherboard of my galaxy3
[Galaxy S II General] gerrard00:
did that solve your problem? I'm in a very similar situation
[Galaxy S II General] dranrebc:
I'm in a very similar situation too, my IMEI is the generic one and I have no original backup of my EFS folder (pre-flashing the new 4.1.2). I do however have a KIES backup, is that of any use?

I followed the steps on this thread and it didn't work. I'm afraid to bring it to the Samsung service centre in case they make me pay a lot to fix it.... :(
[Galaxy S II General] Harsher:
Did you try this solution :http://xdaforums.com/showpost.php?p=35096670&postcount=277 ?
[Galaxy S II General] dranrebc:
I read through that solution and have contacted the OP to see if he can help directly.

The instructions are too confusing and I don't know what the steps involved are, I'm relatively new to this stuff. I'll see if the OP can help, if not, I'll come back and start studying how to write code :crying:
[Galaxy S II General] Harsher:
Actually, that is not "coding difficulty level". You just have to install adb on your machine and an hex editor like Notepad++ with the Hex editor plugin, and use the files in the first link to restore a generic but well structured EFS file.

Then, you don't follow up on this solution because that would mean paying and you should normally not need to,

but you take the newly created nv_data.bin file and edit it in Hex editor, and it should normally restore your IMEI.

I am sorry because I made a sort of walkthrough of this solution (I used it to fix my phone, using the different things

I read and making different tries), but it would be quite long to translate.

Tell me if your IMEI is 004999010640000 when typing *#06#

Also, use a root file explorer and tell me what you see in your /EFS file and the characteristics of mmcblk0p1 file

in /dev/block file (/dev file).

Also, have you some EFS backup file somewhere? (efs.img on your /sdcard, or something like that?)

I will try to help...
[Galaxy S II General] ch_shoaib80:
Many thanks

Thanks a lot for it man, you really are a life saver :) I also messed up my SGS II by installing a Rom. And it just got fixed simply by deleting the corrupted efs folder using Root Explorer and its network lock is unlocked.

Actually my phone's network got locked when I installed a new Rom and it keeps asking me for the Network Unlock Key. Tried several methods but nothing worked and than I came across ur post and just did the 2nd step of it and it worked.

Thanks
[Galaxy S II General] wangxp:
My device had rooted, but when I executed to delete efs folder

RE just showed me "Delete Failed"

So, I couldn't go on....

Someone can help me ?

---------- Post added at 08:22 PM ---------- Previous post was at 07:52 PM ----------

:rolleyes:

How can I handle that ,:rolleyes:
[Galaxy S II General] Harsher:
Well; you're welcome, it has been too much of a pain in the ass for me for not sharing that.

By second step, do you mean you just delete /efs, or used too Ilostit.dd file?

In the first case, it means that mmcblk0p1 was good, instead it means that it was corrupted.

Just go in properties of the folder, and edit permissions so that you can they are all rwd.
[Galaxy S II General] Junyfox:
full efs folder - no nv_data.

Hey,

my esf folder got all the files like imei folder, nv_data.bin, nv_data.bak, but the normal nv_data is missing.

Is there any way to fix this?

Thanks, junyfox
[Galaxy S II General] Harsher:
You are mistaken, nv_data.bin is what is referred to as nv_data.
[Galaxy S II General] Junyfox:
full efs folder - no nv_data.

Allright, but then i dont understand 7) rename one of ".nv_data" files to "nv_data.bin" and another one to "nv_data.bin.bak"

Does it tell me to rename .nv_data.bin to nv_data.bin??

Thanks, junyfox
[Galaxy S II General] hypergamer1231:
I am from india and dont have an efs backup

imei is now generix 004999

serial is 000000000

no network

tried recover and repair nvdata option in efs pro...no go

my question is if i take it to samsung svc will they be able to repair it or the whole motherboard has to be replaced and I hope they wont deny warranty please help
[Galaxy S II General] naifaharsy:
can use this for all device?
[Galaxy S II General] nykaryan:
Same problem. Pls help
[Galaxy S II General] idodror:
very useful!!! thanks
[Galaxy S II General] Harsher:
Actually, you have to take the backup you made before, then copy ".nv_data" to your newly recreated but generic /efs folder,

then rename it as "nv_data.bin", and make again a copy of ".nv_data" to the new folder and rename it "nv_data.bin.bak".

If you have generic emei and serial, try my method,

http://xdaforums.com/showpost.php?p=35096670&postcount=277, read the second link, it should work.

If it does not, try to use the steps of the first link of my post then perform the steps of the second link.

If it does not work, well, they should not have to repair the MB, that is just a software thing and a chip to flash, I guess.

I am not the OP, but as far as I know, I don't think so, different devices, different data structures.

You can try to adapt, but you should look for a specific method.

Same than who? What is your problem? If OP's method doesn't work, try the one described in the link above.
[Galaxy S II General] narell:
root explorer

I tried using Astro root explorer but it is not allowing me to delete my efs folder. can u recommend a good root explorer app? Another thing is when u said 'reset' the phone did you mean just restart or factory reset? thanks alot!!
[Galaxy S II General] rothariger:
Total commander
[Galaxy S II General] labeppanza:
Original imei is usefull just for assistance or is indispensable for telephone?
[Galaxy S II General] narell:
nv data inconsistent

i tried this method i got back my imei but when i used an app to check it said that my nv data was inconsistent..why is this?
[Galaxy S II General] manthanjb:
no imei

where to download modem.zip..?
[Galaxy S II General] elesbb:
In serious desperation here,

i need to know if this method stated in the OP will work on the T-MOBILE SAMSUNG GALAXY S II (SGH-T989)

Thanks all
[Galaxy S II General] daughson:
Thank you so much!!

this post has saved my GT-P1000, i still had my efs folder but i didn't have my ".nv_data file" but the "nv_data.bin" worked fine..

now i can update my tab.. and enjoy it much.

before doing this though I had to first root my tab which was running on Gingerbread 2.3.3, and you need a windows pc.

good thing i still haven't disposed of my netbook yet..

so now, i keep an extra copy of my efs folder on my mac, just for safe keeping..

once again thank you..!!!
[Galaxy S II General] idulkoan:
:(

i dont have a " .nv_data" file...
[Galaxy S II General] JPsy Droid:
Try the .bak/.bin instead...

I haven't a .nv_data too - and my EFS Folder is 100% stock.

Some ideas why?

Edit: May not have a signature yet, I'm using a GT-I9300, coming with 4.0.4, now 4.1.2 stock - and this orig install has no .nv-data (without .bin or .bak).

Edit2: Ups, missed that this is s2...
[Galaxy S II General] :
I saw a great tool for SGS III AT&T where they was able to generate a text file (and some hex code) that was your IMEI

but you was forced to have USB Qualcom stuff and we don't have this, but the idea is great and people have been able to "restore" their IMEI with this method

Just to ask, are your NV_DATA.bin going to be set to the date today (it does so for me)
[Galaxy S II General] wilsacan:
I have a samsung P1000 with the fake Imei 004999.... I still get network and make calls and data but cannot access Play to download anything. how can I correct my Imei to the original one? I have tried all posible fix explained on the net but still failed.

I will apreciat anyone pointing me at the wright direction or any link that has help others to solve this problem

Regards and Thanks from Kampala, Uganda.
[Galaxy S II General] machhho:
Anyone has the original EFS folder for the I9100G or can dump the efs.img by the app ktool , please upload I need it badly .... to recover my IMEI

Thanks
[Galaxy S II General] pump-22:
fake imei

Hi All,

I am trying to get back my imei number as it is a fake on and I cannot call anyone etc. I have tried to do what is outlined in the first post but when I go into the coppied efs folder in the sd card there is no files with dots before them just normal files, but in the root folders the new files have dots in front of them.

I am extremely confused and cant get the imei back using the first method in the original post. HELP PLEASE :(
[Galaxy S II General] machhho:
can anyone dump the original efs folder from the Galaxy S2 I9100G and post it here please , because I messed up this folder on my friend's phone and now his phone is not recognizing the simcard anymore .

please help ...

thanks ....
[Galaxy S II General] KingDavid06:
Tmobile Vibrant.

I can confirm that this process does work for the T-Mobile Vibrant with SlimBean RC2 since I have a backup of my efs folder. I have full service, no IMEI errors anymore. I used Root Browser Lite.

There is one "difference" if you can call it that; the ".nv_data" file that you wanted us to copy from the BACKUP FOLDER to the root efs folder was show as ".nv_data.bak". I copied that over anyway to the root folder, kept both files (there's an option when you paste the file) and renamed them as instructed and completed the rest of the process. Everything came out fine.

Thanks a lot OP! Thought I was going to have to use my upgrade on a note 2. I want to wait for the next gen phones.
[Galaxy S II General] korkete:
I see lots of people saying that they don't see " .nv_data " (file with dot).

That's because root explorer doesn't copy them. (Not sure how OP copied it with the app)

If you also just run "ls" command to list files you'll not see files starting with "."

You have to use "ls -lart" or "busybox ls -lart" to actualy see those files.

# cd /efs

# ls -lart

<or>

# busybox ls -lart

I suggest you back-up your efs folder with following guide so you'll also have the files starting with "."

http://xdaforums.com/showthread.php?t=859914

I see my IMEI as it should be but I can't register on Network for some reason.

I'll try this guide to see if it'll also work for me.

Thanks to the OP :good:
[Galaxy S II General] Unexist6969:
I once deleted the whole imei folder manually, but after reboot the files came back automatically =p
[Galaxy S II General] korkete:
What do you see when you dial *#06# ?

If you don't see the same IMEI number as back of your phone then you broke your IMEI.

If it's the correct one than you're lucky. :laugh:
[Galaxy S II General] Unexist6969:
Yeah it shows the correct imei =P

I though my efs folder was heavily corrupted and was thinking I could get better signal if I just delete the folder xD

I have enough backups (like 100 of them lol) so I don't worry about it;p
[Galaxy S II General] Gassity:
Im having the issue as well. there's no IMEI in my efs folder, what should I do?
[Galaxy S II General] cowbite:
No imei

I followed the instructions to the letter up to step 5 where it says to copy the imei folder from your backup.....

I don't have one. No imei folder. I appear to have everything else though. Am I simply not understanding the directions or am I just out of luck.
[Galaxy S II General] marlonr693:
Samsung s2 i777 imei null

hi guys need your help I have a samsung i777 s2 framework * # 06 # imei null / null and baseband unknown:( Original efs folder I have made ​​a backup when you buy the phone, eh tried many methods but nothing thanks greetings hope your help! !

Excuse my English!
[Galaxy S II General] rythu_u:
i did not flash rom or anything of that sort. my ram was running low , so i just cleared it using go task manager , i restarted my mobile and removed sim and put it back in .. thats it . after that my ram became high but signal got lost and also imei numberis unknown ... i shoud'nt hav restarted my phone :( now im screwdddd !!!
[Galaxy S II General] rythu_u:
yes bro . they did tell me that tooo.. its not true . its a corruption .. not a motherboard problem .. they will just make more money if u change the motherboard thats all
[Galaxy S II General] Adithya88:
same here too....motherboard replacement

even me also. they charged me Rs. 9500 INR ($173) for motherboard replacement.

now i want to root my phone but i am feared....as i already spent $173 due to imei issues.
[Galaxy S II General] rythu_u:
Dude im sorrie to sy this. but u hav been cheated .. i got it done for 150 dhs(probabli 2000 rs) . i tried rooting through 1 clik root apps . which is risk free . but dint work because my phone was secure so i decided to just giv it for repair .. my advice dont go to oficial samsung service . they asked me 800 dhs !!!!!
[Galaxy S II General] Adithya88:
imei

i know i m cheated. but i didn't had any other way to recover my imei No.

can u tell me how did u repaired ur imei without replacing ur motherboard....