Imei problem when downgrading - Galaxy S III Q&A, Help & Troubleshooting

So basically i want to downgrade my SGS3 to 4.0.4 because reason but when i install official 4.0.4 my imei goes 0049xxxx no signal etc but when i flash stock 4.3 or 4.1.2 imei comes back signal comes back and phone works perfectly can anyone help me with that ?:good:

No, you can't downgrade unless you have an efs backup from before EMG4 firmware.

https://dl.dropboxusercontent.com/u/15564398/Recovery/EFSv2_basebands.zip
flash this from cwm it fixes
hit thanks if i helped you

@ferristah: this will install various modems and fix nothing.

Tell me how
how did you downgraded ?
which firmware you used ?

Just flash 4.1.2 with Odin and backup your EFS

Related

[Q] Samsung galaxy s3 HELP

hi i have a samsung galaxy s3 GT-I9300 with Android 4.1.2 I9300XXEMC2/O2U i had flashed it to Android 4.1.2 I9300XAEMG4/BTU i then reflashed it back to Android 4.1.2 I9300XXEMC2/O2U but my imei number has changed and i now cannot call or text when but if i flash it back to I9300XAEMG4/BTU my serial number comes back how can i flash back to my original stock rom I9300XXEMC2/O2U without loosing my imei
jae1512 said:
hi i have a samsung galaxy s3 GT-I9300 with Android 4.1.2 I9300XXEMC2/O2U i had flashed it to Android 4.1.2 I9300XAEMG4/BTU i then reflashed it back to Android 4.1.2 I9300XXEMC2/O2U but my imei number has changed and i now cannot call or text when but if i flash it back to I9300XAEMG4/BTU my serial number comes back how can i flash back to my original stock rom I9300XXEMC2/O2U without loosing my imei
Click to expand...
Click to collapse
Be more specific with next headlines. There are lot of threads of that problem, check them out.
samsung s3 help
could you please link me to a solved thread with this exact problem please
unless you backed up your efs partition . you cant revert to an older modem . my advice for now is stay with mg4 and back up efs . apparently for as of right now if you change your modem you will most likely lose your imei
jae1512 said:
hi i have a samsung galaxy s3 GT-I9300 with Android 4.1.2 I9300XXEMC2/O2U i had flashed it to Android 4.1.2 I9300XAEMG4/BTU i then reflashed it back to Android 4.1.2 I9300XXEMC2/O2U but my imei number has changed and i now cannot call or text when but if i flash it back to I9300XAEMG4/BTU my serial number comes back how can i flash back to my original stock rom I9300XXEMC2/O2U without loosing my imei
Click to expand...
Click to collapse
See the post in GENERAL section re MG4

[Q] (i9300) No Network Data after Flashing Omega ROM v46.1

Hi,
After flashing latest Omega ROM v46.1 (android 4.2.2) everything was working until I disconnected from WiFi and the Network Data wasn't working. It says "Emergency Calls Only" when bring down the notification bar. I looked at my "about device" and I noticed that my imei had changed to "0004999010640000" Which is unusual however I can't find a solution since i forgot my real imei.
I need help quick. I can't receive or send calls and texts and I can't use my unlimited data plan. I checked and its got nothing to do with the network provider and I also put the right APN settings but still no result.
Everything worked fine on CyangonMod 10.1.2 but ever since I changed to Omega v46.1. My network won't work. Can someone please reply fast since I need to use my phone and I am hesitating to wipe and flash anything else as it took a long time to restore my apps and data and settings as it might not show any results.
Extra information:
Current Modem = XXUFME7
Baseband = i9300XXUFME7
Network Provider = Three UK
What kernel u used?
Do you flash kernel module?
did u try out reinstall? If your answer is no, then u should. Do a super wipe e retry.
im having this problem too
Please read general > sticky roll-up thread. read IMEI thread.
DID YOU BACK UP YOUR EFS FOLDER? IF YES YOU CAN RESTORE IT ,IF NOT THAN YOU CAN TRY TO FLASH A NEWER BASEBAND LIKE EMG4 OR EMG2. THE BASEBAND IS PROBABLY THE ISSUE HERE. AS THE BASEBAND YOU ARE CURRENTLY USING IS FME7. YOU ARE ON AN "E" SERIES BASEBAND THE ROM IS BASED ON THE 4.2.2 LEAK FROM MAY. G SERIES BASEBANDS BECAME AVAILABLE AROUNG JULY . THEY ALTERED THE EFS PARTITION SO THAT OLDER BASEBANDS CANT USE IT. READ http://forum.xda-developers.com/showthread.php?t=2377731 AND http://forum.xda-developers.com/showthread.php?t=2393289 FLASHING ANY STOCK ROM WITH A G4 OR G2 BASEBAND CAN PROBABLY RESTORE YOUR NETWORK.
ashraf sharif said:
DID YOU BACK UP YOUR EFS FOLDER? IF YES YOU CAN RESTORE IT ,IF NOT THAN YOU CAN TRY TO FLASH A NEWER BASEBAND LIKE EMG4 OR EMG2. THE BASEBAND IS PROBABLY THE ISSUE HERE. AS THE BASEBAND YOU ARE CURRENTLY USING IS FME7. YOU ARE ON AN "E" SERIES BASEBAND THE ROM IS BASED ON THE 4.2.2 LEAK FROM MAY. G SERIES BASEBANDS BECAME AVAILABLE AROUNG JULY . THEY ALTERED THE EFS PARTITION SO THAT OLDER BASEBANDS CANT USE IT. READ http://forum.xda-developers.com/showthread.php?t=2377731 AND http://forum.xda-developers.com/showthread.php?t=2393289 FLASHING ANY STOCK ROM WITH A G4 OR G2 BASEBAND CAN PROBABLY RESTORE YOUR NETWORK.
Click to expand...
Click to collapse
Flashing Emergency EMG4

[Q] i9100 imei & baseband unknown,,,how to repair?

hi all,my sg i9100zslpg 4.0.3 show imei & baseband unknown,,,,plz help me to fix it,
i search forum but not understand clearly much to fix it,plz guide me,
thanks.
Try flashing some stock roms. If that doesn't work, it's a fairly expensive trip to a service centre or somewhat less expensive trip to a local mobile repair shop.
can you link me with that appropriate stock rom for such problem,or can i try with new jelly bean 4.1.2?
Go to Samfirmware, choose a rom for your carrier (important with this issue in particular) with the pulldown boxes, download the rom, unzip the tar file, throw away the .dll & flash the tar in the PDA section of Odin. And pray as it reboots that your IMEI will be back when you go into settings/about phone/status. You already know what will be happening if you still have the generic IMEI.
my device is rooted,does i need to unroot it first and can i flash the 4.0.4 jplpj on it?
Do not flash 4.0.4. Stay away from it. That you don't know flashing stock firmware will remove root is illustrative of why you find yourself in the position you're currently in.
ok,as i understand you that firstly i unroot device then flash rom,
can i use 4.1.2 XWLSD?
zeeshantayyab said:
ok,as i understand you that firstly i unroot device then flash rom,
can i use 4.1.2 XWLSD?
Click to expand...
Click to collapse
No need to Unroot the phone ma8, just flash the Stock JB 4.1.2 XWLSD firmware pertained to ur region from PC Odin and it will unroot ur phone for u
Alternatively, u can also use 'Mobile ODin' on ur phone (which is rooted for now) to flash the same Stock JB 4.1.2 XWLSD firmware pertained to ur region

probleme with IMEI undefined in my samsung galaxy s3

Hello,
after flash my phone, my IMEI was changed to 0049....
i want to bring back my imei, if there is a solution please help me
thanks to you all
asprillon said:
Hello,
after flash my phone, my IMEI was changed to 0049....
i want to bring back my imei, if there is a solution please help me
thanks to you all
Click to expand...
Click to collapse
Look here to solve >> http://forum.xda-developers.com/galaxy-s3/general/ref-imei-efs-stuff-i9300-including-t2393289 <<
you have to flash older baseband if the problem occured after upgrading. ie. you were on 4.0 (older) and flashed 4.3 (newer) you have to flash the older baseband. (the modem file of 4.0).
if you dont get this. try
1. flashing the original stock rom
2. flash other modem files.
dont forget to hit thaks if i helped you n any way

lose my efs file

i losing my efs folder and files and i dont have a backup
can i recover if i install a stock firmware on galaxy s3
if yes ,were can i download the firmware my galaxy s3 its from Portugal
help me please
Depends how you 'lost' the efs. If you deleted it then no, nothing will fix it apart from a paid repair.
If you just tried to downgrade to a firmware incompatible with your efs then flashing a 4.3 stock firmware might fix it. Download from sammobile.
no i never deleted i just install a galaxy s5 rom
but now i have installed a stock rom every thing its fine my imei its good but i can unlock my galaxy s3 SIm
how do i do my firmware its 4.3
Buy an unlock code.

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