[Q] Can't downgrade to 4.1.2 - Galaxy S III Q&A, Help & Troubleshooting

Hello,i updated to Android 4.3 a few months ago but before the official update was released.I flashed a 4.3 firmware but it is too buggy and laggy,anyways, i'm trying to downgrade to 4.1.2 and then install the 4.3 update via OTA.I downloaded a 4.1.2 firmware and i am flashing it using Odin and it says it has been successfully flashed,however the new 4.1.2 system is not installed in the phone,it's still the same buggy 4.3 one What do i do ?

Flash a firmware from sammobile.com via Odin.
But if you downgrade you will end up with no network unless you read the faqs and guides first .
Plenty of excellent 4.3 rom on this developers forum .
Latest ML4 is excellent .
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
Downgrade and network problems .
http://forum.xda-developers.com/showthread.php?t=2531221

JJEgan said:
Flash a firmware from sammobile.com via Odin.
But if you downgrade you will end up with no network unless you read the faqs and guides first .
Plenty of excellent 4.3 rom on this developers forum .
Latest ML4 is excellent .
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
Downgrade and network problems .
http://forum.xda-developers.com/showthread.php?t=2531221
Click to expand...
Click to collapse
I flashed a 4.3 firmware and a 4.1.2 one via Odin,nothing changed,i already know the risks tho'.

Related

[Q] How to upgrade from 4.0.4 to 4.1.2

Hi, my friends i9300 has Android 4.0.4 Baseband:I9300BVLE4 , Build:IM76D.I9300BVALE4 and at settings->about device there is no "software update".How can I upgrade his phone to 4.1.2 or other official ROMs (without ROOT)?
Please read the faqs and guides all the information is posted .
Use Kies to update .
Baseband is not firmware .
Official roms do not require root to upgrade see faqs and guides .

[Q] How to revert back from 4.3 to 4.1.2 (Malaysia Region)

Hi guys. I need some helps. I'm from Malaysia and the android that i used before is android 4.1.2 I9300XXEMF6 (original firmware). Then ive upgraded it into android 4.3 (I9300XXUGMJ9) for UK region. Even though it is an official samsung firmware, i found out it is unstable. I flash it back to android 4.1.2 (Malaysia original firmware) but something happen. The "network have not registered" problem. I then found the solution by rooting it and install the modem. But it act funnily as the android seems unstable from before. I flash it over and over again hoping that reverting back to 4.1.2 will be the same as before but i ended up using 4.2 as the 4.1.2 have network problem. I already search the forum and find many solutions but none provide the files that i need. I also have tried KIES method by recovery and initializing method but it resulted the same. "Network has not registered. The only solution is to root it and i would really like to NOT to root my phone.
My question is, can someone provide me with necessary files such as the pit files, phone (modem) and the CSC files that specifically for Malaysia regions? I already have the firmware file. Please guys. The instability of 4.3 is driving me crazy.
BTW im using i9300.
Stop.
You are going to brick your phone if you flash things without understanding them.
Go to general forum and read the sticky post, especially efs 'know this stuff'.
Flashing a pit file WILL brick your phone.
When you flashed 4.3 you upgraded to efs v2, there is no way back. You can only use EMGx and later modems now, find a later modem that will work in your country, either with 4.1 or 4.3.
Edit. Backup your efs, perform a factory reset, flash your 4.1 country rom then an EMG modem.
hey man, thanks. One question, where can i find this emg modem?
darkeiser said:
hey man, thanks. One question, where can i find this emg modem?
Click to expand...
Click to collapse
Its under SEARCH man
JJEgan said:
Its under SEARCH man
Click to expand...
Click to collapse
+1
darkeiser said:
Hi guys. I need some helps. I'm from Malaysia and the android that i used before is android 4.1.2 I9300XXEMF6 (original firmware). Then ive upgraded it into android 4.3 (I9300XXUGMJ9) for UK region. Even though it is an official samsung firmware, i found out it is unstable. I flash it back to android 4.1.2 (Malaysia original firmware) but something happen. The "network have not registered" problem. I then found the solution by rooting it and install the modem. But it act funnily as the android seems unstable from before. I flash it over and over again hoping that reverting back to 4.1.2 will be the same as before but i ended up using 4.2 as the 4.1.2 have network problem. I already search the forum and find many solutions but none provide the files that i need. I also have tried KIES method by recovery and initializing method but it resulted the same. "Network has not registered. The only solution is to root it and i would really like to NOT to root my phone.
My question is, can someone provide me with necessary files such as the pit files, phone (modem) and the CSC files that specifically for Malaysia regions? I already have the firmware file. Please guys. The instability of 4.3 is driving me crazy.
BTW im using i9300.
Click to expand...
Click to collapse
What you`ll need is a new version of 4.1.2 with a mg4 baseband or latest, the 4.3 rom changed your efs folder format. If you want to stick with your 4.1.2 go to http://forum.xda-developers.com/showpost.php?p=43946365&postcount=15 and flash that emergency.zip (mg4 baseband), it should do the job.
Hi guys. Already solved the network problem by installing the Modem DDEMG2 files via odin. Thanks for your guys helps and advice. For some that thinks that i haven't read many posts, i have read them but cannot grasp the concept. Sorry for the inconvenience. Many thanks.
i9300 galaxy s3 IMEI lost and something showing on the homescreen
last time i had flashed my galaxy s3 i9300 to the leaked official android 4.3 , after updated battery drain fast so i decided to downgrade to official 4.1.2 , but after i downgrade IMEI lost and show emergency call only , and something is showing on the homescreen . I really need some help
lowminghung said:
last time i had flashed my galaxy s3 i9300 to the leaked official android 4.3 , after updated battery drain fast so i decided to downgrade to official 4.1.2 , but after i downgrade IMEI lost and show emergency call only , and something is showing on the homescreen . I really need some help
Click to expand...
Click to collapse
Your question has been posted multiple times . Forum rules require you to search before posting .
Google <<< I9300 your search terms > xda
STICKYS
http://forum.xda-developers.com/showthread.php?t=2344125
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
Downgrade and network problems .
http://forum.xda-developers.com/showthread.php?t=2531221

Downgrade to official 4.2.2 ROM

Hello,
Recently I updated over-the-air to Andrioid 4.3 (baseband version I9300XXUGMJ9), build number JSS15J.I9300XXUGMJ9.
It was running android 4.2.2 before, updated over-the-air aswell. I have not rooted or modified the phone in any way. Since updating to android 4.3 it's has been painfully slow during unlocking and I wish to downgrade it to 4.2.2 however I can't find any official ROMs, I can only see 4.1.2 or 4.3.
Does anyone know where I can find official 4.2.2 ROM ? (and how to downgrade). The phone was bought unlocked, I believe.
Thank you
Hey
If sammobile.com doesn't have the 4.2.2 firmware then it's not there for your region s3..
Try a Google search or use 4.1.2..
Sent from my Amazing Samsung Galaxy S III...!
tchindalia said:
Hey
If sammobile.com doesn't have the 4.2.2 firmware then it's not there for your region s3..
Try a Google search or use 4.1.2..
Sent from my Amazing Samsung Galaxy S III...!
Click to expand...
Click to collapse
Sam mobile doesn't seem to have any 4.2.2. I am 100% sure that I had android 4.2.2 before.
There are 2,2 custom roms posted .
marvino said:
Sam mobile doesn't seem to have any 4.2.2. I am 100% sure that I had android 4.2.2 before.
Click to expand...
Click to collapse
Now I have installed I9300XXUFME7_I9300OXAFME7_OXA this OS and it says emergency calls only ...
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
JJEgan said:
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
Click to expand...
Click to collapse
Thank you, I followed this tutorial ( http://www.youtube.com/watch?v=i7K6RDVRBhs ) and my phone is working fine.. thankfully with android 4.2.2 and rooted. I will read those threads aswell as they are very useful for the future...

How to downgrade from stock 4.2.2 to stock/custom 4.1.2 rom?

Guys I have been having a hectic time with this no network issue in my i9300. I upgraded from 4.1.2 to 4.3 without backing up the EFS folder and tried to come back to 4.1.2 and then the network registered problem came. So after many failed attempts I flashed the stock 4.2.2 via odin and gave my phone to a shop and got the corrupted EFS folder done with the repair box. Now the thing is when I flash Neatrom or the Omega 4.1.2 roms I do not get the network. I get my network ONLY on my stock 4.2.2 rom which has the patched MG4 modem. Please help me to downgrade and install Neatrom 4.1.2 rom and get my network back.
I have got a backup of my 4.2.2 EFS folder.
Your question has been posted multiple times . Forum rules require you to search before posting .
Google <<< I9300 your search terms > xda
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
JJEgan said:
Your question has been posted multiple times . Forum rules require you to search before posting .
Google <<< I9300 your search terms > xda
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
Click to expand...
Click to collapse
hello, I know there are plenty of threads regarding this. I went through all of them. I just want to know if anyone else encountered a problem exactly like mine.

SGS3 4.3 IMEI problem

Hay guys ,
I'm Mina Alphons and I having a problem with my SGS3 I9300 16GB
...
my phone doesn't read my imei when i install a MG4 or higher modem !! it can't be upgraded to efsv2 !!
i can't upgrade my phone to android 4.3 JB cause my IMEI will be like that 006.....
I tried to flash my old modem that i use now MB5 on 4.3 .. and i get unknown imei and serial ...
what should i do to upgrade my phone to 4.3 without imei problem or modem problem ???
in a easy way
I'm running 4.1.2 stock rom .. every thing works fine
upgrade to 4.3 ... imei problem
my efs partition can't be updated to efsv2 what should i do ?????
any one help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Well thats odd. First make a backup of your imei if its not corrupted in the 4.1.2. Older than MG4 modems have efs v1 but MG4 can read both v2 and v1. Upgrading has never given a imei problem in my experience, only downgrading. Again BACKUP your IMEI. Factory reset and flash a stock rom do try 4.3 after making nandroid and efs backups. Which rom are you using btw?
Your question has been posted multiple times . Forum rules require you to search before posting .
Google <<< I9300 your search terms > xda
STICKYS
http://forum.xda-developers.com/showthread.php?t=2344125
UNDERSTAND FIRST
http://forum.xda-developers.com/showthread.php?t=2362743
Network IMEI EFS
http://forum.xda-developers.com/showthread.php?t=2393289
Downgrade and network problems .
http://forum.xda-developers.com/showthread.php?t=2531221
Mod Edit
Please read the stickies in General
Thread closed
malybru
Forum Moderator

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