yashsingh1/xdaforums huggingface dataset:
[Galaxy S III General] danarama:
Tricky one.... if ktool only babkup, factory reset and flash stock. Fails? Send repair

This is all really simple and is all covered in post 1. Unsure why im having to repeat myself. Did you read post 1?

Roms released before 1st July = efs v1.

Roms released after 1st July = efs v2

If you flash ANY efs v2 rom, without EFS backup, you can NEVER use efs v1 again.

If your latest stock rom for your region is efs v1, tough luck. Flash efs v2 rom from another region!

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[Galaxy S III General] Eddicts:
Sorry..ok don't mad at me.Im noob that just getting started.so can i use international stock?
[Galaxy S III General] danarama:
Yes. Anything after July 1st

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[Galaxy S III General] kangerX:
.tar. gz are highly compressed. Unpack it on PC then copy over contents with any suitable method to phone's Efs folder.

sent from the state where marijuanated muffins are NOT illegal !
[Galaxy S III General] danarama:
Yeah. It can compress quite well. I've got one that's 36KB

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[Galaxy S III General] kangerX:
Same here. mine are mostly 40 kb on unpacking it's 5 MB.

sent from the state where marijuanated muffins are NOT illegal !
[Galaxy S III General] Eddicts:
can i refer to this thread? http://xdaforums.com/showthread.php?t=2323847
[Galaxy S III General] yogosun:
Alright, made it work, with "[TOOL]Backup/Restore EFS (IMEI) for all SGSIII". Turned out I had the outdated restore tool. Thank you all for your help! You guys made my day!
[Galaxy S III General] danarama:
Yes

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[Galaxy S III General] mircea89fzr:
Sorry you have to repeat yourself, but I don't quite get it. I understand that flashing a rom with efs v1 will make it imposibile to read efs v2. But why do people STILL have no network problems after going back to a rom with efs v2? Some solve it through flashing different modem or by installing stock rom and restoring efs. But why there are people who still have the problem despite doing this? I'm asking since I don't want to render my phone useless.

Another question: if I flash only a new kernel, keeping my stock rom, does this affect the efs?
[Galaxy S III General] danarama:
Various reasons.... can't list them.

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[Galaxy S III General] mircea89fzr:
what about flashing only the kernel, does this affect efs?
[Galaxy S III General] polhena:
Newbie Help

Hi all,

I'm a bit overwhelmed with the amount of information around, so hope someone can shed some light to my understanding.

I have been reading most of the forums on how to flash a custom ROM, backing up etc.

I have a SG S3 I9300 model running stock Poland firmware version I9300XXELKC (4.1.2)

Now I want to put a custom ROM onto my device as it's no longer in warranty. I have rooted my phone and also installed the latest Philz CMW recovery as well. I have made a nandroid backup too.

What other steps do I need to do before installing a custom ROM to be safe from this IMEI issue?

If I install one of the newer Omega ROM as per this link http://xdaforums.com/showthread.php?t=1663656 am I okay do go ahead in the present state or do I have to upgrade anything on my phone before upgrading?

Also I'm a bit confused on this statement in post 1.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

From July 2013 (XXEMG4) onwards, official Samsung ROMs change the format of your EFS Directory/Partition. Let's say these ROMs change from EFS v1 to EFS v2. Only basebands from July 2013 (MG2) onwards can read EFS v2.

Quick info rules:

EFS v2 Basebands can read EFS v2 and EFS v1

EFS v1 basebands CANNOT read EFS v2, ONLY EFS v1

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

as per this statement, if I install one of the new custom ROMS as Omega v49 Jelly Bean 4.1.2 Based on firmware UBEMH5 I assume the baseband on my phone will change to EFS v2. so if this is the case, as per the rules mentioned, I don't need to worry since EFS v2 can read both versions? am I right?

Thank you.
[Galaxy S III General] danarama:
Nope.

1) do a custom backup in philz and select "efs"

2) you don't need to worry but you can never go back if you don't backup efs.

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[Galaxy S III General] danarama:
Benefit being you can use older basebands. What if these new basebands drain your battery or give you worse signal?

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[Galaxy S III General] adithyav:
Losing IMEI on reboot

So I've been having this problem for about a week now and I tried looking around and there doesn't seem to be anything about it

I'm running Temasek's CM10.2 with the MG4 baseband

For about a week now, every time I let the battery drain down or power off my phone and turn it back on, it resets my IMEI/EFS.

Thankfully I've got a backup so I simply restore the EFS folder via Root Explorer and a direct reboot sets it right and I can connect to my network

But only until the next time it powers down where I have to do this again.

When I try to backup the EFS with Philz CWM (After I've restored the working EFS via Root Explorer and I can connect to the network), it seems to back it up ok but when I reboot from CWM, it resets the IMEI to 0049 whatever again.

I'd love to know if anyone has a solution for this or if anyone has faced a similar problem. I'm not quite sure what the issue is.
[Galaxy S III General] danarama:
I would try deleteing the contents of EFS manually using root explorer, then restore EFS via Philz.

No idea if this will work. Not seen this issue before but worth a try.
[Galaxy S III General] adithyav:
I emptied the EFS folder completely and manually restored a backup. Tried rebooting and it is working for now. Not messing with Philz backup/restore yet because it is working without issues. If the same issue comes up again, I'll try that. Thanks.
[Galaxy S III General] danarama:
Good news.
[Galaxy S III General] DTHC:
Need some help, information. I have installed Omega MH1 based rom, i want to restore phone back for selling, i know and have readed all the info about EFS versions and so. Just wanted to ask if i go back from MH1 to MG4 will it corrupt my efs or not. I have efs backup prepared for just in any case needed.
[Galaxy S III General] danarama:
Anything released AFTER 1st of July is EFS V2 so no problem. You just cannot install anything released BEFORE 1st July as this would be EFS v1, but your phone is now and forever EFS V2.
[Galaxy S III General] awahwah:
rootSu,

Would you be so kind to answer some questions just to put my mind to rest?

I have the Int version of the S3 with the MG4 baseband. I want to flash CM 10.1.3 stable to it. I'll backup the EFS as per your excellent tips before I do anything.

Will the CM rom read the EFS folder okay or will I need to do something else for it to work? - from reading this thread it would appear that a ROM based on AOSP will not touch the baseband and function fine - am I correct?

Will flashing a MG4 official ROM put me back to stock without any ill effects?

And, flashing a custom recovery touch the baseband?

Sorry if these sound like basic questions but I've only flashed my Tab2 up till now and really did not care if anything went wrong. My phone on the other hand...

Thanks in advance.
[Galaxy S III General] danarama:
It's only official (july or newer) ROMs that CHANGE the EFS to v2, but it's the baseband that has the problem reading it. The ROM doesn't read it. AOSP ROMs do not come with a baseband so whatever baseband ytou had before flashing will be there after flashing.

If by ill effects, you mean IMEI will still be readable, then yes.

No. recovery does not use telephony services at all. It's an OS that runs separately from telephone functionality. It doesn't use a baseband so theres no reason it would flash one for you. It would be like buying a pair of shoes and getting free donuts with them. Completely unrelated.
[Galaxy S III General] ramezs:
hellpp

I upgraded my Galaxy s3 to new firmwere 4.2.2

but after that i lose my network connection and my IMEI change to 004999010640000 my serial not was changed

I apply the batch and able to connect to network but still no services "Jawwal-Palestine" and i lose my serial number no it all 0

i tray different firmware but no use

any help how to restore my serial number and my IMEI and the network

i think when i restore my IMEI and serial all problem will be fixed

plz any help I tray all solution
[Galaxy S III General] danarama:
There's no patch to apply. What EXACTLY did you do?
[Galaxy S III General] builtonRock:
A question rootSU if I may.

Previously I have used Siyah kernel, which I believe makes a backup of your IMEI number in the form of efsdev-mmcblk0p3,img.gz. Can I use this to restore my IMEI, and if so how?
[Galaxy S III General] danarama:
I assume you'd have to extract to .img then use a tool from post 1 to restore it.

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[Galaxy S III General] briansusilo:
Hello Everyone, I have a rooted Galaxy S3 with the Netherlands JB 4.1.2 firmware PHNEME2. I already backup my EFS using k-tool when my phone is still okay.

Now for some unknown reason, I got my IMEI changed to 0049xxx with unknown SN and CSC. After I restore my EFS using k-tool, I got the SN and CSC corrected (restored from unknown), however my IMEI is still 0049. Any idea how to solve this?
[Galaxy S III General] Eddicts:
Sorry..Noob again here to post one more question.Currently i have the XXEMG4 (Omega v48) and my IMEI were still there.I want to revert back to my region XME (malaysia) so here's what im going to do,I downloaded stock rom that comes with XXEMG4 UK and will REFLASHED again with XME (Malaysia),so do u think this will work to restore everything?
[Galaxy S III General] danarama:
No Idea. If you were having problems with SN, repair is the best option

What modem comes with Malaysia? That is the information you need to know whether it will work or not.
[Galaxy S III General] Eddicts:
it's DXEMB1
[Galaxy S III General] danarama:
B = February.

The ONLY way you can use any baseband earlier than G = July, is restore an EFS v1 Backup. Have you got one?
[Galaxy S III General] Eddicts:
No.. :crying:
[Galaxy S III General] danarama:
You'll need to wait for a malaysian update then

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[Galaxy S III General] Eddicts:
Oh no.. :(:crying:
[Galaxy S III General] danierakes:
flash mg4 stock rom la kawan...if u want to return back to full stock rom.mg4 tuk XME blum ade lg...
[Galaxy S III General] jock11:
Hi All

I bought my S3 I9300 yesterday, having been a galaxy note user and flashaholic. 1st thing i did was root & install philz recovery.

I used to flash sometimes twice a day switching between cm/aosp & touchwizz. Also am used to backing up EFS (never had to use it though).

So ive backed-up my EFS (in 4 different places on phone sdcard & extcard & pc & dropbox). Done.

I have checked firmware that came with phone, JZ054K.I9300XXEMC2 (BASEBAND - I9300BWELK1).

Now im desperate to get Slimrom or hellybean, after reading most of this thread i assume its safe to flash either of those roms?

AOSP wont affect baseband is that correct?

Now if i want to come back to touchwizz i either have to flash MC2 based rom?

or flash a newer based rom & stay with newer baseband? can someone confirm i am getting this right please

many thanks in advance.
[Galaxy S III General] danarama:
Its the rom that changes efs not the baseband. Only touchwiz roms after July change efs.

Not really sure where mc2 comes in to it?

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[Galaxy S III General] jlguillot:
nv_data.bin

Hi,

I have a question that may not make sense, but just incase.

I did have a backup of the efs folder but I cannot find it. I had one on the phone and one on my laptop, but they are lost.

What I do have is a back up of te file nv_data.bin.

If I restore this file, is it enough to repair an IMEI 00049 issue?

Thanks.
[Galaxy S III General] jock11:
XXEMC2 is the stock firmware that came on the phone. What i meant was if i wanted to flash a touchwizz rom after trying aosp would it have to be a xxemc2 based rom?
[Galaxy S III General] spocky12:
It won't. Send me your current .nv_core.bak + your nv_data.bin backup and i might be able to help you.
[Galaxy S III General] ramezs:
.

I mean ariza patch

because it chow than no network and no services

after applying the patch I apple to connect to network but still no services

first of thing the problem happened after I apply the new rom 4.2.2 the last leaked rom and resting my counter using triangle way "reset clavien cash include" , then I applay many roms but nothing work

after I lost the hope I went with my phone to repair he apple to return my IMEI number and network but serial number still 0

and when I tray to re flash new ROM Network problem back but still have my IMEI number so I return to repair again and wait to be repaired

Is there way to fix the problem

and how I can restore my serial number

"Now I backup my efs using ktool "

Thx
[Galaxy S III General] predator.sro:
Hello,

im stuck on installing stock 4.0.4 rom and without imei, signat, atc...

I have efs backup after flashing Ultima rom but i cant mount efs in cwm. :( Any solution how to solve it, please?

And maybe someone will know other solution using my copy of efs folder taken with Root Explorer. Coppying files in that folder not helping.

And how is it restore efs using tar.gz files? I tried almost everythning but nothing helps me.

Thank you for any answer.

Now, in morning i tried just another of thousands solutions...and here are my steps by steps...(You must have CWM custom backup of EFS folder!!!) 1. using odin install stock ICS rom 2. using odin flash Philz recovery 3. in recovery make custom backup of EFS and reboot 4. install root explorer 5. using root explorer find efs backup folder in clockworkmode folder and copy there your backup of EFS 6. reboot into recovery and restore custome backup of yours EFS 7. now you should have restored IMEI and you can flash a custome rom

PS: i tried many sollution so these steps are as i well remember and must not strictly work...but it works for me! ;)

At all THANKS FOR THIS THREAT!!!
[Galaxy S III General] kangerX:
Hi. How do you analyze nv_data.bin ? The disassembler loads it as well , binary file.. as it is in hex.

sent from marijuanated muffin cut into pieces by My Shining Katana
[Galaxy S III General] danarama:
What a strange question. No. Flash any rom you want :/

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[Galaxy S III General] danarama:
Ariza patch is ONLY if you have serial number 0000. Was this the serial before flashing ariza?

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[Galaxy S III General] predator.sro:
now i am on AP XXUFME7, CP DDEMG2,CSC OJKFME1.IMEI is OK.

What should i,must or shouldnt do if i want to flash roms as earlier and not to brick my phone again? Thanks
[Galaxy S III General] JJEgan:
Use google and search for the IMEI/EFS guide its all posted on a daily basis .
[Galaxy S III General] danarama:
Please read post 1.
[Galaxy S III General] jock11:
Sorry, not meant to be a strange question, I'm just making sure i'm doing it right.

What i mean is because i'm on stock firmware that came with the phone (I9300XXEMC2) i havnt flashed any roms yet.

From what i understand if i flash aosp rom nothing changes in the EFS?

If i decide to then flash a sammy rom, to save any probs i should flash an older rom?

If i decide to flash a newer rom i.e. MG4 based im stuck on that unless i restore my EFS to original?

thanks
[Galaxy S III General] danarama:
Remember, anything before July is EFS v1. Anything from July is EFS v2.

In MG4, The G = July

In MC2, the C = March

Since you have EFS v1, take as many different efs backups as you can. Flash whatever roms you want

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[Galaxy S III General] predator.sro:
Ok, but which step please? It means that now i am able to flash MG4 or newer ROM only? Thank you
[Galaxy S III General] danarama:
Step 2

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[Galaxy S III General] predator.sro:
So if i understand well, EFS v2 is more compatible? Or better? I may install any rom and it will work?
[Galaxy S III General] danarama:
If you install EFS v2 ROM, you will change your EFS to (you got it) v2. This means you can never go back to an EFS v1 baseband without an EFS v1 backup.

This is all in post 1

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[Galaxy S III General] jlguillot:
Hi, thanks for the reply. I am having also an issue that the phone won't start. I can only start it up in download mode or recovery mode.How can I reach the .nv_core.bak file?
[Galaxy S III General] danarama:
Adb pull if you know where it is. See post 1

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[Galaxy S III General] jock11:
Thanks for that, another quick noob question, if i may,

Ive backed up everything in different places, now if i flash slimbean, do you think its worth flashing your

EFS v2 baseband (CWM) flashable package before reboot. sounds like they are better modems for the uk.
[Galaxy S III General] danarama:
Flashing the basebands alone changes nothing so its safe to do so

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[Galaxy S III General] jock11:
Thanks again, didnt really want to to flash a touchwizz rom just yet just to get the modem, this way saves the hassle. So if i then decude in the future i want touchwizz i just flash a custom rom based on mg4?
[Galaxy S III General] Sadeyes80:
My dear

I have same problem I solve by using aroma patcher or you can use glance s4 rom it is work for me very fine

Good luck
[Galaxy S III General] danarama:
I can see there's something here you still don't understand but I'm struggling to put my finger on what exactly that is

In answer to the question, flash whatever rom you want. Its really not important and you shouldn't waste any more time dwelling on it.

Here are the facts!

1) YOU have an EFS v1 rom.

2) if you have an EFS v1 backup (which you could take now), you can flash any rom or baseband combination you want

3) if you have an EFS v2 rom AND have no EFS v1 back up, you cannot go backwards...

4) but then what does that even matter anyway? Baseband nostalgia is overrated

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[Galaxy S III General] stevendeb25:
Ok. I had to use patch zio basebands to get imei back. To mg2. I got network (calls, sms, multimedia) I got the H on the signal. But no data. cant use web browsers/xda/facebook. But I can login to poker app???? Lol. Any ideas I got backups of efs dating back 1 in june. 4 in august. 1 in sept. Restoring dont seem to do anything using ktool.

Any ideas?
[Galaxy S III General] danarama:
Delete efs before backup.

No idea what patch zio baseband is

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[Galaxy S III General] stevendeb25:
You mean before restore?

Lol meant basebands.zip
[Galaxy S III General] danarama:
Yes sorry. Delete efs content before restoring...

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[Galaxy S III General] jock11:
Thanks for all your help, ive finally sussed it. Now i know this is off-topic, but i noticed in your signature that you run rootbox rom

and i assume that you have an s3 and live in the uk, Did you have any issues on cm/aosp with wifi, because i cant connect in any

cm/aosp rom, but with touchwizz/sammy roms i can??? I'm now on Glamour S4 rom (4.2.2) wifi no probs. any ideas?

I know i shouldnt post it here cos ive already done it in the Q&A section, but its doing my head in, ive tried evrything.

cheers
[Galaxy S III General] danarama:
I saw your thread. I've never had these issues. Did you try different kernels?

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[Galaxy S III General] jock11:
yeah ive tried different kernels, ive even tried the same as from your sig still no joy, ive read a lot on xda and google about this issue

seems quite a problem with a lot of users on cm/aosp roms but nobody has a concrete fix for this, some work for some not others.

cheers for your help anyway, i will keep trying.
[Galaxy S III General] soronk:
rootsu your simply the best... just saved my messed up sgs3 ;)
[Galaxy S III General] mircea89fzr:
Would there be a way to back up efs without root? I don't want to break ota updates before updating to the latest. I wouldn't want to use odin yet (I didn't do it before) to flash stock in order to remove root and re-enable ota updates.
[Galaxy S III General] xerol:
guys i have efs backup but dont know whether it is efs1 or efs2 how can i get it which version it was?
[Galaxy S III General] danarama:
By knowing what rom you were on when you took it

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[Galaxy S III General] xerol:
i dont know i just found that in my laptop where i took backup of my sd card
[Galaxy S III General] danarama:
If it was created before July, its v1.

Otherwise only a restore will tell for sure

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