yashsingh1/xdaforums huggingface dataset:
[Galaxy S III General] Cezar`:
As long as you don't flash the MG4 modem, nothing changes. The modem creates the problem, not the ROM itself.
[Galaxy S III General] FINEEEEE:
Thank for the bro

Desde cualquier lugar de mi ciudad con el GALAXY S3 de samsung
[Galaxy S III General] danarama:
If you flash the MG4 modem on its own, EFS remains unchanged. You can go to any other baseband. Same with the MG2 baseband. I've flashed both and returned to NEDL1 without issue.

If you flash an MG4 ROM with the MG4 baseband, EFS format changes. You can only use the MG2 or MG4 baseband moving forward unless you backed up EFS first. Same with the MG5 rom
[Galaxy S III General] danieldp1990:
I was on MF6 and i resive an update of 9MB and now im on MG4......... what can i do?
[Galaxy S III General] Oomahey:
Enjoy the new firmware. :good:
[Galaxy S III General] spocky12:
Nope. There's no need to unlock again after mg4+ flash. Imei/lock data is moved from efs to some other place, unlocked devices will keep their state.
[Galaxy S III General] wengyu78:
the problem i facing is i accident flash mg4, now need send to samsung claim warrenty .. : (
[Galaxy S III General] Oomahey:
Simple: Download the firmware of your region from Sammobile and accidentally flash it again! ;)
[Galaxy S III General] Cezar`:
OK, now everyone knows another reason why Samsung made this move :)
[Galaxy S III General] Cezar`:
I'm confused now. So what you're saying is that a certain binary in the ROM combined with flashing this modem, renders the efs unreadable when flashing other modems? I find it hard to believe.

Was pairing a different (older) ROM with the MG4 modem tried to see if the same behavior occurs?

I know one thing, efs partition does not change, cannot change. The only thing that can change is the way the nv_data.bin and additional efs files are encrypted/encoded and that can be changed by career specific bundles/settings (hidden.img+cache.img).

Was removing this from the flash package tried? You can create a new package by using these commands, on Linux (Ubuntu), within the directory where you extracted the contents of the *.tar.md5 file

tar -H ustar -c boot.img recovery.img modem.bin system.img > ROM.tar
md5sum –t ROM.tar >> ROM.tar
mv ROM.tar ROM.tar.md5

Note that I removed sboot.bin, cache.img, hidden.img, tz.img for safety reasons (when zips are flashed via recovery, these are not flashed anyway, and while cache.img and hidden.img contents are often copied to the /system folder, we can try to remove them altogether this time for testing purposes).

*Just want to mention that I do not know exactly what files are present in the MG4 ROM tar.md5 pack. I would keep everything out for this test except for boot.img recovery.img modem.bin system.img
[Galaxy S III General] Striatum_bdr:
The process is not clear but clearly flashing modem alone doesn't change efs. Have done this several times to test and have been able to revert to older modems without issue.
[Galaxy S III General] Cezar`:
OK, got it, but right now the message is "stay away from this firmware". I'll try to test once I get some time. From what I understand, efs restore was tested and worked when going back to your own career's stock ROM, correct?
[Galaxy S III General] HC4Life:
So, i had the leaked android 4.2.2 jelly bean rom before revert to stock. Now i have BTU I9300XXEMG4 stock rom.

My qustion is: How to backup efs folder without root? Do i have to root my device again to backup efs folder or there's a solution for non-rooted devices?

Thx :)
[Galaxy S III General] Cezar`:
Nevermind, root still needed.
[Galaxy S III General] Striatum_bdr:
Efs restore works regardless your Rom, as it depends on modem version. Before MG* modems you'll need 'old' efs.
[Galaxy S III General] Cezar`:
Yep, thought that would be the escape route if my tests do not have the expected result.
[Galaxy S III General] HC4Life:
So, reverting back to stock firmware I9300XXEMG4 was a mistake? I'm f**ked up? I have to root again to backup efs folder?
[Galaxy S III General] Striatum_bdr:
It's not a mistake. If your phone is running fine you don't face a problem. Since July all future updates will have the new efs format. If you root and backup your efs you'll just backup...the new one.

All people will sooner or later have a new efs, except those like me that didn't perform a full official Rom update (and if backwards compatibility is broken in the future I'll probably have to....). You just can't revert to modem prior to July ones.
[Galaxy S III General] HC4Life:
Yes, my phone is running great. Before that i was running the leak android 4.2.2 jelly bean and i was facing some lags. Well, i have efs folder backup from the leak rom, can i use it if i facing network and imei issues in future?
[Galaxy S III General] Cezar`:
And this is something that you know from who? Sorry, just want to know where this information is coming from.
[Galaxy S III General] Striatum_bdr:
Read the thread. Do you really think Sammy will change it for Europe and India, and will revert it next time? .

---------- Post added at 03:12 PM ---------- Previous post was at 03:10 PM ----------

Why would you have imei issues. Those imei things are a bit like the monster under the bed.

Keep your backup. You'll probably won't need it.
[Galaxy S III General] eggman89:
I flashed UltimaROm 14 with the latest modem and now my phone cannot find the IMEI at all.

I have taken the backup of EFS , but how do I restore it?

I am planning to flash a stock ROM(http://xdaforums.com/showthread.php?t=1868004) , since this ROM crashes and stuff.

WIll it restore my IMEI or I have made my phone unusable.
[Galaxy S III General] Oomahey:
Which modem are you on currently? Did you try flashing the MG4/MG5 modem?

How did you take the EFS backup?
[Galaxy S III General] eggman89:
Hello

I had taken the EFS backup before installing Omega ROm , some 3-4 months back.

Here is what I did:

1) Installed UltimaROm with MG2 Modem.

It crashed at every step, but somehow went till the About phone section to find IMEI being null.

2) (Might Have made a mistake here)

Installed UltimROm again n desperation , but with MG4 .

Same result.

I also took a backup of RFS again with K-Tool and compared with the one I had taken 3-4 months back.

The file size, strucure etc under both ZIP seems identical.

So my EFS might not be corrupted.

Now I am planing to install MF6 from here:

http://xdaforums.com/showthread.php?t=1868004 .
[Galaxy S III General] marracing:
No network

Guys I need help please!

I was travelling the last 3 months with my S3 and my phone said there was an update and I did it (I was in Indonesia). Coming back to my country (Chile) I had no signal. After reading some forums I think I screwed up. Baseband is XXEMG4. IMEI is the same as appear in the back of my phone (I searched for it dialing *#06#). I don't know what to do to fix it. Sometimes I get signal but when I try to call it says that im not registered in the network. My phone is rooted but before upgrading I didnt backup the EFS. Is the anything I can do?

Please help me, I would appreciate a lot!!

Thanks for your time.
[Galaxy S III General] eggman89:
I think you're EFS is safe. And if it is safe, there is nothing to worry about.

Re registering the phone to the chili network, or a factory reset might help.
[Galaxy S III General] andrewwright:
Im new to s3 and its come with mg4. How is a safe way to bk up the efs iv got now? Should I just leave it alone till new firmware comes along. ? Iv got the mg4 modem on sd card just in case. Iv not rooted or tried custom roms with this phone yet. Bit worried I dont have an efs bk up. And I dont have the chance to bk up an older firmware efs. Many thanks for some info on what I can do now :(

Sent from my GT-I9300
[Galaxy S III General] danarama:
Always backup efs. Follow link in signature to sticky roll-up. Read imei / efs - know this stuff. Links to backups there. Also, the mg2/mg4 modem zip I created backs up efs. Get as many backups as possible.

Now though, you're destined to stay with mg* modems until newer come out.
[Galaxy S III General] andrewwright:
I no about how much I need to bk up the efs. On th s2 I had 5 in different sd cards lol iv bin reading lots about the s3 and need to do alot more. Only first day so early days. Not gonna rush into any thing just yet. Again thanks for the info mate :D:thumbup: also iv got the mg4 modem zip ready for when I do make my move. Read read read time again

Sent from my GT-I9300
[Galaxy S III General] CROrION:
Guys I have problem:

Flashed 4.2.2. got imei changed to 0049

Flashed 4.1.2 got imei changed back to original

But now i have no network.

Tried ARIZA patch on 4.1.2 - then I lose imei, serial everything.

Reflash 4.1.2. got imei, serial, etc back but still no network.

What now?
[Galaxy S III General] marracing:
I can't register the phone, it's very strange. and the reset also didn't work. Do you have another idea?

Thanks!
[Galaxy S III General] eggman89:
Can you check the Radio for your S3. Then check if the Radio is for your country or Indonesia.

Might be that the New Firmware installed a radio not suited for your country.
[Galaxy S III General] danarama:
Why did you try ariza patch? Its ONLY for serial number.

It also seems that if you use ariza on mg4 - it doesn't work. If you use ariza pre-mg4, im not convinced mg4 works.

Hopefully [MENTION=4758670]ariza27[/MENTION] is looking into the new mg4 efs format but if not, people flashing the patch *may* need to send for repair.
[Galaxy S III General] CROrION:
Any sugestions what to do now?
[Galaxy S III General] HC4Life:
Flash the emergency.zip from here:

http://xdaforums.com/showpost.php?p=43946365&postcount=15
[Galaxy S III General] marracing:
You mean the Radio FM app? It's Chilean.
[Galaxy S III General] Oomahey:
No. He means the modem. Modem is also called radio (among others) or baseband.
[Galaxy S III General] marracing:
It's ok to check for the modem with *#1234# ?

It gives me:

Version

AP:I9300XXEMG4

CP:I9300XXEMG4

CSC:I9300DBTEMG3

Thanks
[Galaxy S III General] juanchu66:
help

hello good on my galaxy s3 then try to install firmware mg4 down and lost my imei, now put the mg4 or mg5 i does not return, I have no efs backup that I can do I have 0049 imei corrupt and folder i heard of one I can spoocky help?
[Galaxy S III General] eggman89:
Don't worry.

Just flash the stock firmware (before MG4) with Odin.

Download from sammobile .

I just had the same issue yesterday.
[Galaxy S III General] Oomahey:
No need to do all that. Baseband version can be seen under Settings>About device. :good:
[Galaxy S III General] rajugsg2702:
Thanks a lot

Thanks a lot

My galaxy s3 i9300 is back after baseband update (MG2 modem.bin through ODIN). people at samsung service centre told me that they can repair IMEI but costs about US$150. I am grateful to XDA-developers forum for step by step solution. :good:
[Galaxy S III General] JJEgan:
http://xdaforums.com/showthread.php?t=2344125
[Galaxy S III General] pRo_lama:
How about new firmware MH1 and compatibility with MG4/5/6 ???
[Galaxy S III General] Pousse Mousse:
It's ok :

http://xdaforums.com/showpost.php?p=45061273&postcount=12259
[Galaxy S III General] manks:
OK guys, seems I've fallen foul of this going from Ultima ROM to Fantasy HD Rom and then reverting back to my old backup. I have downloaded the stock GT-I9300-XXEMG6-ODEXED and flashed through cmw (would odin make a difference?) and subsequently restored my EFS backup and thankfully my IMEI number has been restored, but unfortunately I am still receiving the warning not registered on network.

my baseband is currently mg4 and build is xxemmg6 as above. is there any way to get this resolved please? btw - i know i'm an idiot for flashing without checking the forums about latest changes....lesson learnt! please help!
[Galaxy S III General] giov87:
So i'm guessing that because of mg4 modem and my corrupted efs backup, i can't be stock and official, right? Even if i flash emergency zip and reflash my latest official rom.. :(
[Galaxy S III General] boomboomer:
I'm on a EMG4 tw based custom rom and have official status, flash count of zero -no problem. Device status is modified, due to root, but easily reversible.

---------- Post added at 09:38 AM ---------- Previous post was at 09:32 AM ----------

If your imei number matches the one under your battery then the efs folder is readable. Does your serial number also match?

Maybe flash a full stock EMG4 rom via odin and see if you can connect with that.
[Galaxy S III General] manks:
my imei and serial number match. Would it be ok to do a rom flash through mobile odin or would i need to do it on a pc?
[Galaxy S III General] slaphead20:
I would do it on the pc to make sure everything is as it should be, mobile Odin won't flash the bootloader and I'm pretty sure MG4 contains a new bootloader
[Galaxy S III General] slaphead20:
If you use mobile Odin and tick wipe etc and inject su and everoot it seems to clear the flash counter, has done for me the last 2 times I flashed a firmware this way, so you don't get that incremental increase just from booting.
[Galaxy S III General] diddsen:
i tested shortly the mg4 and then flash with mobileodin me7, then arhd v32.

so, can someone say me what can do to become a functionally phone :D

why it dont work if flash on pc with odin stock?...

iam so .... :(
[Galaxy S III General] LancelotSA:
So what does this mean to us mere mortals who must like to have the latest firmware so flash these official releases? I do not bother changing modems and am happy to stick with the one that comes with the firmware. Does any of this actually concern me?
[Galaxy S III General] Brotuck:
Is it possible to backup efs when you are already running the MG4 modem ?

Or do we just need to wait until more is known ?
[Galaxy S III General] slaphead20:
Working fine as it is for me, rooted, flashed couple of mods ok, so if your happy with the modern then it's good to go :)
[Galaxy S III General] JustArchi:
Yes it's possible but as for now no way to go "back" if you don't have old backup. So if you're already running MG4 modem and don't have any backup of your old /efs then you need to stick with it, at least for now.
[Galaxy S III General] Brotuck:
Oh i do have a backup of EFS on my (e)SD card. But as the MG4 modem works fine, i think ill keep it for now.

I will keep a watch on the developments.
[Galaxy S III General] berkeesmer:
After I have installed this rom, my IMEI was back. I was happy. Now another problem came out. My battery drains more than it charges. Is there anyone living that problem after flashing the rom or is it just me? Is it possible something is wrong in the phone? AC Charging and computer charging look good on other phones?
[Galaxy S III General] yahyoh:
the same thing happened with Note 2 users after ME6 and MF2 update :silly:

http://xdaforums.com/showthread.php?t=2332913
[Galaxy S III General] boomboomer:
It isn't the rom, either your lead, charger or kernel - if you've changed it.
[Galaxy S III General] richie00:
Hello, I've just installed your emergency modem but still doesn't have phone line and connection with my Phone Operator.

I've installed XXEMG4 and screwed my phone, the imei was rewritten to 0049xxxx, and now I can't have any phone calls or internet data.

Please I require assistance.

Greetings from Peru :)

Richie
[Galaxy S III General] MattBooth:
Just install XXEMG4 modem and your phone will be fine. Nothing is screwed.
[Galaxy S III General] JustArchi:
Hello.

First of all turn off your phone for about half a minute. Turn it on and try again. If you still won't be able to connect to the network (give it at least 5 minutes, sometimes it needs to reload /efs and can't instantly connect) then you can try also with my xxemb6 modem. If you won't be able to connect here as well then I'm afraid your efs is corrupted.

Good luck.
[Galaxy S III General] richie00:
Hello,

If my efs is corrupted, is there a way I can fix it? I'vw bought my phone from another country and there is no tech support here in my country :(. It was working perfectly until I applied this new XXEMG4 and screwed my mobile unit :(

So there is no solution so far? or should I wait until a fixed ROM?? I don't know what to do :crying:

Richie
[Galaxy S III General] d1rekt0r:
I don't have any problems with this rom at all , I just gave one question .

I can't go back to any old stock rom right, but I will still be able to go to New updates/roms as soon as they release them right (eg official 4.2.2 or 4.3) ?
[Galaxy S III General] SignetSphere:
try the fixes stated by JustArchi here: http://xdaforums.com/showpost.php?p=43946365&postcount=15

if all else fails then try flashing a fresh stock rom using Odin.

You can still go back to any older stock roms BUT if you upgrade to MG4 you can't go back to any old modems

IF you don't have an efs backup prior to installing MG4. And yes you can still update to new roms.
[Galaxy S III General] ysrini:
You can do what ever you want to do, if you have your EFS backed up. As said above it just changes the EFS structure it doesn't corrupt it.

As a thumb rule of XDA know what you are doing and its consequences before doing anything.
[Galaxy S III General] ysrini:
You are Right,

I have a note 2 and also a S3. I nearly got affected with the MF2 update. For some reason with my LTE model (7105) when I went back to older ROMs the IMEI was intact. Later when the MG4 for galaxy S3 was out I was worried, it might be the same case with the latest S3 firmwares.

Based on a few discussions which started from here, we thought it does and hence this thread to notify people and to zero-in the problem.
[Galaxy S III General] lucalunardi:
Maybe I'm being repetitive in the question but if someone answer I'll thank!

I was on EMC2 and updated via Kies to EMG4. Everything seems to work fine so far and I don't have the efs backup.

I'm not planning to go AOSP, only to future sammy updates.

Question 1 - If, for any reason I do a reflash of this same ROM will I have any problem?

Question 2- If I need to go back to the stock ROM for warranty, will I have any trouble If I revert all to stock? I mean using all original stuff, Rom and Modem.

OBS: My original set was Product Code: ZTA/ PDA: I9300UBEMA2/ CSC: I9300ZTAEMB1 / MODEM: I9300UBELL1

Question 3 - The corrupt efs folder problems happens on any downgrade or will it happen only with modem only downgrades?

Thanks guys...
[Galaxy S III General] zoot1:
1. No

2. If you go back to your Original ROM you will face this problem.,...however you mentioned you flashed this ROM via Kies which means this update is available for your region..hence if you wish to go for warranty just reflash this full firmware via Odin/Kies

3. EFS is not corrupted but as I have read on these threads..it will happen even if you just flash the modem file from EMG4 [AFAIK]
[Galaxy S III General] dfMails:
Which modems can I flash after efs-change? (After XXEMG4)
[Galaxy S III General] JesusEsquivia:
No signal - MG2 Baseband - HELP.

Hi, I updated my phone to the EMG2 basebands, and i never got any signal; after downgrade I lost my IMEI but i recovered it when i did the modem change to EMG2. My issue now is that I don't have any signal, my phone remains on Emergency calls only.

Is there any solution to this? Because I flashed other modems, they keep my IMEI but doesn't get signal at all. I really desperate about this, any help will be appreciated.

Thanks!

I'm form Colombia, Currently using bandbase EMG2. Stock rom. Sorry for my english.
[Galaxy S III General] MIKEMON:
If you're correct, IMEI, and again flash through odin official fw.

Maybe you want to restore,, IMEI, backup, EFS, you must do.
[Galaxy S III General] boomboomer:
There is no way back without an efs backup.
[Galaxy S III General] JesusEsquivia:
Solved.

Actually Zuluman patch solves the problem. If by posting the same here i upset you in any way i offer you excuses. Thanks for the response. :good:
[Galaxy S III General] manks:
Alas, I have tried again without success i.e. flashed stock through odin and still cannot register on network, this is what i now have

baseband: i9300ceemg2

build: xxemh1

Is there any hope, like others who encounter this problem, i am also desperate to solve. thanks for your help guys
[Galaxy S III General] HC4Life:
If u not have an efs backup, u must unroot your device and flash the STOCK FIRMWARE I9300XXEMG4.
[Galaxy S III General] Royceda:
Confused about dual booting

I've flashed omegas XXEMG5 rom and after reading this thread i was wondering if it is possible to dual boot using siyah kernel to AOSP/AOKP roms. Could anyone kindly tell me the procedure of which to flash first on secondary rom installation screen, I mean the XXEMG5 modem using emergency zip or go ahead with the usual procedure.
[Galaxy S III General] ekie84:
I have a question...am on XEMG4 modem...i want use XXDLIB modem...what should i do?or im just stuck with XEMG4 modem?thanks

Send from my GT-I9300 using Tapatalk 2 (Luna ROM v2.1beta / 3.0.64 Luna Kernel)
[Galaxy S III General] danarama:
Modem is irrelevant. Its what rom gave you the modem. If you were on mg4 ROM, then you either stick with mg* modem or restore backed up efs from before mg4 rom.
[Galaxy S III General] nik60:
hi rootSU

i have gs3 with firmware mg4 itv no signal after ota udate

imei is ok

in setting i choose only gsm and reboot

in only gsm working

maybe mg4 modem have a problem with wcdma that is fast

i want try with other sim
[Galaxy S III General] manemzjum:
I was having problems with a rom (probam) so reflashed a rom i had on my phone revivarom v1 android 4.2.2 http://xdaforums.com/show...php?p=43221721

Once i done this i have no network or data cannot make calls texts although i do have a signal bar ?

i have flashed the XXEMG4 modem

i have also tried the emergency.zip modem found here http://xdaforums.com/show....php?t=2377731

i have a file on my sd card efs.tar but not efs.img i assume was created by a rom i installed as some ask if you want to backup efs so i must have at some point

I have extracted these files deleted efs folder on root and replaced with files from efs.tar still nothing other than putting phone in factory mode

i have tried restoring this using ktool to which has done nothing

The annoying part is i have used this rom previously with no problems i think i had the no network but after flashing emergency.zip all worked perfectly fine

Now it seems i am now left with a brick

Any other suggestions other than bin
[Galaxy S III General] danarama:
If you were on official before and OTA to official after and you're stuck, contact your provider / samsung. Whoever gave you the OTA.
[Galaxy S III General] W@r10ck:
Hi i just wanna ask has anyone encountered this before?message keeps popping up whenever im in the homescreen. Luckily my phone still works.I just cant get rid off that message.I was trying to restore my old efs. I already tried to full wipe,dalvic cache,flash rom and modem again but still no good :(

I forgot to mention my device is i9300
[Galaxy S III General] danarama:
Factory mode. Millions of posts about ot including my imei / efs thread in "sticky roll-up"
[Galaxy S III General] W@r10ck:
I noticed that when i flash an AOSP Rom(CM10) that message actually dissapears but as soon as i flash back touchwiz the message is back. I dont get that factory mode(actually i did twice but its gone after i reboot and didnt see it comeback) i will try to read back the threads.im dowloading my region stock rom and gonna try flash through odin hope it get rids of that message

Edit: Flashing stock Rom via Odin didnt work.
[Galaxy S III General] W@r10ck:
I fixed it!.I just restored my efs image using ktool and everything is back to normal :)
[Galaxy S III General] ifzaal305:
1. Root phone

2.Install Root explorer

3.Browse ROOT via Root EXPLORER

4.Open folder ''factory"

5.Inside open folder "FactoryApp"

6.Open file "factorymode" (not factorymode.bak just "factorymode") and edit it

7.If it says OFF change it to ON and save and exit

8. reeboot

Do at your own risk

but ive done it 100s of times, works like a charm

Im also a refugee of the IMEI crisis in the I9300, surviving with the ARIZA patch

rewrote my IMEI from the 00499 to the original usind the samsung tool box and using ariza patch.