yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] 08r3308:
If you flash stock software with odin do you still need to back up ?
[Galaxy S II General] scaramonga:
Many many thx to the OP for posting this, not tried it yet, and will wait till I sober up until doing so ;), as that is why I'm in the awful mess that I am at the moment.

My first post, hello to all you wise people on this wonderful board (long time lurker).

I expect no sympathy as I will admit that my Galaxy S II is broken due to my own stupid actions, and rather than make a new thread explaining so, being the 'noob' and watched the intro video, I'll add to what is another helpful thread on this great board. Please accept my apologies if it is long winded and boring, and I mean no harm and disrespect to anyone on here. I am an 'idiot' who went in with 'big feet' without properly reading the information freely available, here, or elsewhere, and cocked it up big time.

Let me give you guys a laugh.

I just got my GS2 and attempted to 'unlock' it with a little program called Galaxy_S Unlock. Little did I know, it was already unlocked lol, fair enough I thought, and it backed up my EFS files. For some reason though? (that reason being too pissed to understand) I proceeded to delete my EFS folder under Root Explorer, which it happily done so, and upon reboot, you can guess lol, no network, no data, full signal, but no way of connecting to my provider (Orange). Emergency calls only, no texts, network lock prompt, yup, the grim lot. I was on Darky's ROM and on every boot was 'enter network unlock code'.

I wiped phone and installed stock Samsung ROM (KE7 I think) and that got rid of the 'enter network unlock code' prompt, but this is now where I stand. No network, data, full signal and emergency calls only. WiFi OK as to be expected I suppose. Go to dial any number, 'No network available or detected'. Try to manually select network, same.

IMEI now shows 004999010640000.

I will not send my phone in for repair, due to who it is I bought it from, regardless, It's my fault and I have one simple question should the OP's method not work.

Could this fix my problem below?

-----> z3x box??

Many thx for listening to my drivel peeps :)

Merry Christmas & a Happy New Year to you all!!
[Galaxy S II General] MStevie:
did it work on stock rom 4.1.2 ?
[Galaxy S II General] rawr:
Might be a silly question but could a corrupt/missing imei/efs cause vibration to not work?
[Galaxy S II General] gastonw:
No, it wouldn't.
[Galaxy S II General] vapourEyes:
I wonder if the IMEI is stored somewhere in hardware ?

I know its in the nv_data.bin file, but if someone has a corrupt /efs and their sdcard backup is busted too, then is it a return to samsung having triangled away and flashed stock rom ?

I wonder at which point is the IMEI comprehensively broken.

Does the phone always backup a non-00000.... / 49..... factory IMEI if its good ?

What should happen I guess, in an ideal world, is the phone backs up the, IMEI containing, nv_data.bin file when and only when it has connected to a network ?
[Galaxy S II General] kpk64:
Do you have any information on how to restore Galaxy S2's firmware to it's original PDA, Phone and CSC, and rooting it with CF-Root?

Thank you in advance with your help.

:fingers-crossed::fingers-crossed:
[Galaxy S II General] Nyamkai:
I found a trick, I had lost my IMEI number while flashing roms.

My phone is a LG Optimus Black Ku5900 (korean) for me all I had to do was flash a V30I cp file.

I think to get your IMEI you need the correct cp file, or else the KU5900/P970 different modems dont work anymore.

Sorry for bad english
[Galaxy S II General] :
What's this cp file you're talking to
[Galaxy S II General] Nyamkai:
When you flash a rom you have the option of flashing cp. files or ap. files.

To not lose your network you usually never flash cp files, unless you choose the right one corresponding with your imei.

I have lost my IMEI and the only cp file it would accept was a V30I which is the korean version.

So if you figure out what type of cp file you need then you can get your IMEI back without any problems.
[Galaxy S II General] duke_1286:
Hi, i too being a novice flashed a few roms and found out that my wifi is not working and was not able to make any calls (Network not able to connect) and got the fake IMEI as you had too. I never made a backup of the EFS folder too :(

I followed steps 1 to 4 as you said.

In step 5 i couldnt find the .nv_data file. Instead i only had the .nv_data.bak and proceeded with steps 6 to 9

in the end after restarting the phone, i found that IMEI is 0000000000 and not restored ( i tried this with the aim of erstoring my original imei)

copied the backup efs folder and restored the fake IMEI :(

Now my sim is not detected, no wifi

Kindly help
[Galaxy S II General] D™:
It wont help buddy. Main cause is Nv_data.bin file corrupted. If there is no .bin file then you can't recover your IMEI. Better to move to SSC.:(
[Galaxy S II General] :
ehm never seen those files, hmm maybe need to look at that
[Galaxy S II General] moraize:
Guys.

I have a galaxy note 2 and Having a very strange problem.

After installing a New rom with new firmware, I tryed to put back older rom, and After that I got no Imei..

So Went back to the new one and still no IMEI...

So the olny way to put the phone to work again was to delete efs folder , reboot, copy the efs folder from a backup I made before installing the rom.

So after the reboot, Everything is ok.

BUT if I restart the phone Again, it stays with IMEI 0049...

So I have to make the process of deleting/ puting efs folder backup again...

So I Really think its something about permitions, so I found this post, and BEFORE doind the chwon comand, I did a " ls -la" and I could See that the nv_data.bin was already ( radio:radio). Even so deleted the folder, rebooted, copyed the nvfile, could see it was Root:root, did the chwon comand, rebooted and Crazy IMEI yet (0049...).

So I´m getting crazy with this thing. What makes me mad is WHY when I delete/ reboot/ copy/reboot, it FUNCTIONS and after another restart, it stops funcioning ??

Thanks for any help here...
[Galaxy S II General] Safely-x:
Hey,

I have a Samsung Galaxy S3. I tried this method but failed.

I didn't take a backup of the orginal EFS Folder.

I deleted efs folder without a backup of the efs folder.

The orginal efs folder is gone.

Any helps?
[Galaxy S II General] notanerd:
well i have karbonn s1, will copying efs folder from another karbonn s1 phone help?
[Galaxy S II General] Th3KiNG:
i don't see .nv_data anywhre :crying:

---------- Post added at 06:19 PM ---------- Previous post was at 06:02 PM ----------

ppl are saying this work fine "GSII_Repair"

i have n7100 tried not working...

tell me what i am doing wrong
[Galaxy S II General] bendavosvilla:
I had same problem and the same results as moraize described but what I did after that was install omega rom v18. In the initial set up it asks if you want to backup efs I selected no and did a complete wipe through the aroma set up process then once rom flashed I had my original imei number so then I downloaded imei backup from play store for note and note 2 and saved My imei so now I have backup.

I don't know if this was a coincidence but it worked for my problem. Hope it work for you and anyone else with this problem, as I was about to get it repaired.
[Galaxy S II General] S@USER:
Worked but not again

Hi.. I was able to successfully restore my original IMEI using the SII repair tool when the fake IMEI was showing up. But after the phone was switched off once, the phone gor back to null IMEI and the tool does not help now. Any ways to make the phone show the fake IMEI so that I can use the SII repair tool to restore to original IMEI?
[Galaxy S II General] alee1730:
when making a secong copy of the ".nv_data" i receive a paste failure "there was not enough free disk space to complete the paste operation"

the ".nv_data" file is 2mb! and the total folder size is 5mb!

this is on the GT-I9000
[Galaxy S II General] jeremyharith:
N7105 doesnt have imei and baseband after accidental flash through odin with NAND cle

Hello bros, im new here, and after searching through all the forums, xda and various websites i still have not found a solution for my problems.

I had a rooted RootBox rom, and i clicked a setting to simulate secondary devices and my phone went into a bootloop.

After i checked online it said that that was a problem with CM based roms.

The solution to this problem was to boot into recovery(CWM) and to just wipe(factory reset).

After a lot of times i tried booting into CWM while the phone was off i couldnt. This was because i was holding down the volup+home+power button, and did not let go the power button when the note II screen came up.

I started to panic and i thought i should flash stock rom into the phone without wipes via odin with the "nand clear all" button ticked.

It still bootlooped.

After doing that, i finally found out the correct way to get into cwm while the phone was in power off state, and managed to wipe and get the phone to boot without loops.

Only thing is, now my base band is unknown, IMEI unknown, IMEI SV unknown, and i have to signal bars whatsoever.

I have tried looking into the root directory, and then the efs, and there was no nv_data.bin or nv_data.bin.md5.

I have read online that the N7105 does not have a nv_data in the efs directory and that it is possible to just bring the imei back to the generic imei(0049...) and that it will work.(Im hoping that Starhub does not block generic imeis')

I have checked all the forums, even on XDA and there doesnt seem to be a way to fix this, as most of the ways are based on the fact that i need to already have an efs backup such as those in here.

I have not done an efs backup or any of those backups for radio.

Even my cwm backup of the stock rom before i rooted was gone because of the ''nand clear all'' function i have ticked when flshing the new stock rom.

If anyone out there who has a solution or has gone through this before please help, i would be very greatful as i have already searched for 6+ hours.

I want to check here first before going to the starhub shop because going to the starhub shop is my last option.

Thank you all in advance.:)
[Galaxy S II General] amjed26:
i have the same problem for my device note 2 and i tried every thing but nothing changed

pleas if find out any thing tell me or contact me on my gmail amjed26
[Galaxy S II General] amjed26:
Hi all

I had tbe same thing with all of u

I'v downloaded using odion supernexes rom for sgn2 n7100 and after using of 3 dayes then i decided to return to the latest orginal rom and i download it from sammobile modem csc pda all in one

Then it took so long to download from odion to my phone

After ending i tried to call but i have a problem with network ... then after searching of the problem it was from the imei its not the same as the numbers behind the battry

I tried allmost every thing avelable but no change

I hope that i cud find any thing usfull here

Thank you

and surry for my bad english
[Galaxy S II General] Klyupp:
Has anyone tried this? : http://xdaforums.com/showthread.php?t=1804117&page=23&nocache=1
[Galaxy S II General] simplyanin:
I had visited samsung service centre and when they had searched my imei number, they found that country showing as unknown..and they told me samsung wont service any phone with unknown imei..is there any way to change the country by editing any file? I want to show them that my gs2 is from india.
[Galaxy S II General] AriGold:
Strange, i've flashed my phone many times and my imei number is still the original one. *#06# gives the same number as the one on the box.
[Galaxy S II General] takayochi:
can someone confirm if it's work with galaxy s3 i9300 ??
[Galaxy S II General] Badelhas:
Thanks for your tutorial, very helpful. I dropped my S3 i9300 on water and have the imei null /null and baseband unknown problem, therefore SIM cards are not recognized. Do you think my problem can be solved by following this method?

Thanks in advance for your help
[Galaxy S II General] pipanoramix:
Sorry but where is the efs folder? i don´t see it.... i have root my phone and i don´t see it and i don´t have any imei..... when i put *#06# the phone puts invalid imei.

I can´´t call with my phone and i am desesperated

I need help

Sorry for my english ...... Thank you
[Galaxy S II General] bialabs:
Risk using Generic IMEI

My EFS folder is accidentally disappeared (no backup :( ). Now my IMEI is 004999010640000

Which risks I can take using a generic imei?

my operator does not block .. I can make calls, sms, internet ..
[Galaxy S II General] edsoedso:
At this page http://xdaforums.com/showthread.php?p=32753333 I found this that works for MTK processors:

1- go to em with this code "* # * # 3646633 # * # *" (just type it on call pad)

2- then follow that path --> CDS info --> Radio info --> Phone1 (for the first imei)

3- at the top there is a command line which begins "AT+" just type there "AT +EGMR=1,7,"IMEI_1" (instead of IMEI_1 put your first imei number)

4- hit send command

5-if you done just reboot the phone, if you change the second imei go to step 2 and select "Phone2"

6-and enter the code "AT +EGMR=1,10,"IMEI_2" (instead of IMEI_2 put your second imei number) hit send command

7-reboot

Maybe it can work for other marks in case em code is available.
[Galaxy S II General] sergio114:
Very very thanks for Tutorial recover Imei.
[Galaxy S II General] Badelhas:
Can't someone please help me?! I am desperate here...

Thanks
[Galaxy S II General] archfranck:
problem imei

my imei the current is not working I think it's stuck in my my tab2 galaxy gt-p3100 can use sth new rom or procedure to have another or generic and operate the phone .. for now I do not dulla recorded net .. they told me to use ariza pacjh but on my model may not be the phone I bought it regularly .. but the seller can not seem to track it down now I have no more warranty. qlc help me thanks

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[Galaxy S II General] imdogdream:
if i don't have original efs folder how can i fix this?

thank you

i am having problem with this 004999010640000 problem
[Galaxy S II General] maazen:
is there a tool?

hi there,

i do not have a copy of the ims folder BUT i do have the original imei number - it is on the packaging of my phone, and also on a sticker that came with it.

so, is there a tool where i can enter the number into my phone, or maybe a tool that would let me create the "nv_data.bin" file based on my number?!
[Galaxy S II General] dark_blitz:
thank you for this helpful post, I was wondering if this may BRICK your phone if you don't do this properly?
[Galaxy S II General] elmikarbordi:
recovery phone imei easy

hi to all.a several day a before i see change my imei to 004900.....I was upset :rolleyes::(.I searched the Internet very day.Then I was able to restore the defualt serial nomber :highfive::victory: .If you already have a backup of efs folder.go to old back up and open root explore and extract efs back up .now go to sdcard go to speed software folder/extract copy N-data.bin and n-data.bin.md5 files and go to root folder past this files to efs folder and replace ok.now your phone restart auto if dont restart manuall.after restart you can now see your orginal imei serial number.i am happy very for can recover my imei now.if you see your imei default go to root explore and zip efs folder and go to speed software folder and copy this file to your pc for the hard day.thanks bye:):good::fingers-crossed::highfive:
[Galaxy S II General] fluxerik:
Hey,

I have the same problem. First my phone showed an IMEI of 0046*** or something and a s/n of 0000***. It still recognized my sim, but without calls, internet etc.

But now it's doesn't even recognize my sim anymore and it shows IMEI: unknown (or null/null when I do *#06#) and my s/n is not 0000**** anymore but now it looks like a normal s/n but it's the wrong one.

Nothing that I tried worked.

I have NO backup of my EFS. My build is XXEMH1. I would really like some help, because I don't want to send my phone away for 3 weeks or more.

I guess i'm kinda f***ed up. :((

Thanks in advance
[Galaxy S II General] Jeetu_xda:
I flashed CM 10.1 by dhiru from stock ddlf2 in my galaxy sl i9003. After flashing phone worked fine for around 4 days and while calling a friend, the screen went unresponsive for few seconds and the network was gone. Now the phone shows error while searching for networks. In the phone status IMEI shows unknown. Am I having problem with the IMEI?
[Galaxy S II General] Jeetu_xda:
Could not fix.

Step2: 'Delete failed

efs from /

OK'

Step5: '.nv_data' is not there.
[Galaxy S II General] LuigiBull23:
Great guide!
[Galaxy S II General] fluxerik:
Brought it to the phone shop last friday. even they didn't know what to do. So they send it to Samsung for me.

No worries for me. Luckily i reset the flash counter so it's in my warranty.
[Galaxy S II General] purpleraintoxicity:
need more explanations

i dont understand..

im on PA rom. lost of imei cause of kernel switch and i dont have any EFS backup.

in the EFS i have now i have two differences:

1. no .nv_data file. only nv_data one

2. no IMEI folder!
[Galaxy S II General] nikhilgavit:
Check if your phones baseband shows "unknown".. If so u need to flash a modem file..
[Galaxy S II General] Jeetu_xda:
Baseband shows Unknown. Flashed xxkpe which included modem file but nothing changed.
[Galaxy S II General] Eduardogv:
My baseband shows as 1900xxms2 and I do have an IMEI number showing up, but I still have no phone signal .

What might it be? Can I try something before sending it to repair ?

Enviado desde mi GT-I9100 usando Tapatalk 4
[Galaxy S II General] Shirito:
When i had this problem i tried this guide and didn't worked fine. I've lost my patience and paid for a man who used that "box" thing, and it took 5 minutes to fix it.
[Galaxy S II General] lawong:
this guide only worked if we have original efs backup..
[Galaxy S II General] persianrisk:
Hi guys, yes, before doing this method flash to your original PDA/whatever as the author has said.

I had the same problem, and I tried about 12-13 times (why so many times? who knows may be I was doing something wrong) and it finally worked! (glad I had backed up the EFS folder by the way there are apps that do that for you in a SECOND thery are free so if u recover urs back it up using those apps and again back up the folder).

I only did one thing different although I am not saying this is what made it work - at the end when i wrote the chmod flash instead of rebooting I turned phone off booted into recovery mode I wiped flash and THEN rebooted.

For those that have lost their efs folder do try to use ODIN and download mode to boot to a recovery (basically an older stock firmware) this may get the IMEI back for you. Good luck and THANK YOU SO MUCH FOR TIHS GUIDE - confirmed working on Samsung galaxy s2 gt-i19100 M from Bell Mobility with ice cream installed.
[Galaxy S II General] bendavosvilla:
Hi I had the same problem with my s3 after flashing back to an older Rom. Apparently after the latest Samsung update or on roms with the newer modem the efs format has changed so when you go back to an older Rom it corrupts the efs folder. What I did was installed a different kernel then my imei was back and no problems since. Hope that this helps.
[Galaxy S II General] lawong:
newer galaxy device are diffrent from an older galaxy device which newer galaxy hav other efs partition backup that when we mess up our partition we can simply restore it back with flashing the right modem/rom etc..
[Galaxy S II General] Muraki:
Apparently I have found myself screwing up the efs part while flashing a ROM. If someone has skype and could help me resolve this issue that would be great. PM me please! I did make a backup of my EFS folder before doing anything to this phone. But the two files you want me to copy over do not appear in the backup I made. Any ideas?
[Galaxy S II General] bilal bhatti:
invalid imei after factory reset i9100

does it work with my problem as well???

i just bought it online. i just do factory reset my i9100 and after that its showing invalid imei and sim card not working please help me

running version 4.0.4 before reset working fine
[Galaxy S II General] jemis1983:
Thank you
[Galaxy S II General] jt.one:
---------- Post added at 04:19 AM ---------- Previous post was at 04:10 AM ----------

[/COLOR]i have no backup of my original shipped EFS folder

my /data/radio is formatted

my /factory folder is formatted

anyway to recover IMEI? or is my GNEX a paper weight now .........?
[Galaxy S II General] kaizokan:
I got my IMEI back by following the first 2 steps.

1. Flash your SGSII with Odin v1.85 with the following firmware: I9100XEKDB.rar

(Other stock firmwares i tried failed..)

Now your IMEI should be back (dial *#06# or see settings>about>status>IMEI)

2. Root your SGSII with: XWKDD_insecure.tar

I also needed to use the root option of SuperOneClick after doing step 2. (Make sure USB debugging is enabled on your phone)

After that make a Backup of the EFS folder with a root explorer or with one of the following apps: KTool, GSII Repair or EFS Pro (PC tool) and safe it somewhere safe

3. On your phone, connect to WIFI, go to market or play store, and download the following files:

GSII_Repair

Busybox Installer

4. Install Busybox v1.17.1

5. Open GSII_Repair

6. Go to Repair GSII tab, follow the steps.

7. Your phone will reboot and you finally can see your IMEI and BASEBAND, now you are allowed to insert any SIM.

Source: here

:confused: How can i KEEP my IMEI after going back from stock to a custom rom by restoring a nandroid backup?

Whenever i restore back to my custom rom i get no IMEI even though i get my network working by selecting the right provider in settings.

Already tried restoring the EFS backup, (from the just created backup from stock AND also the Cyanogenmod created auto efs backup).

UPDATE: I left behind my backup and started clean with a stock based rom (i do have my correct imei)
[Galaxy S II General] batth62:
no imei

Dear i installed custom rom (tried many cod, cm7 jelly blast, nex ace i, simplycity etc.) at my galaxy ace 5830i.

every thing is fine but phone shows no IMEI so no network.

Then i unbrick my phone using odin with stock rom of 5830i. then my phone shows correct IMEI .

i cheked contents of efs folder using root browser

but it is always empty then i take backup of efs folder with Galaxy toolbar it save a backup file in sd card.

then i again installed custom rom then restore efs folder using galaxy toolbar but no improvement. plz help.
[Galaxy S II General] sahalan:
Why not try to restore using the OP's method on the first page? Also for those who cannot see the backed up files in EFS folder, are you using ES file explorer? If you are then make sure to go into settings and put a check next to 'hidden files'. That's what worked for me.
[Galaxy S II General] Deadeye74:
Hello, I tried to do what you did, but when I use root explorer and delete EFS directory, the system is rewrite it instantly. And then, when I try to rename the copied .nv_data.bak file, it says nv_data.bin is already exist, root explorer can not create it.

I have JB 4.1.2 installed on my S2 i9100 and I have saved the EFS folder to a safe directory.

Can you help me?
[Galaxy S II General] DigiGoon:
No imei, no baseband, no signal

well i have Xolo Play..and i formatted modem folder...in my fone there is no efs folder..instead there is a rfs folder in data in rfs there is modem/data/fatory...inside factory the imei.bin is stored..and it is deleted...when i pasted my imei.bin...the device has now the fake imei starting with two zeros...now what to do?? Plzz help me
[Galaxy S II General] featherknox:
Backing Up EFS from 4.3

I have already updated my S3(I9300) to 4.3 and now I am regreting. Having returned to 4.1.2 I lost my Phone's network and I also don't have my EFS back up. But When I am on 4.3 the phone is working fine. Can I backup my EFS folder on 4.3 and then paste it back in 4.1.2???? PLz do reply//