Downgrade from 4.3 to 4.0.4 problem - Galaxy S III Q&A, Help & Troubleshooting

When i flashed 4.0.4 version via Odin i dont have network or service, my IMEI was 0049********* type. Pls how can i fix that? I cant find solution, i just want latest version that not buggy on my S3. Thank you

jagodic95 said:
When i flashed 4.0.4 version via Odin i dont have network or service, my IMEI was 0049********* type. Pls how can i fix that? I cant find solution, i just want latest version that not buggy on my S3. Thank you
Click to expand...
Click to collapse
You should've done some reading first:banghead:
I am afraid to ask if you have Efs backup?
Flash 4.3 again and pray . If it recovers(imei) then downgrade to 4.1.2 and when you choose firmware be sure that it's not below mg4 modem.
Backup Efs after flashing 4.3 if you get back your Imei.
Sent from my Nexus 4 using XDA Free mobile app

Related

[Q] Downgrading Galaxy SIII (GT-I9300) from 4.3 to 4.1.2

Dear friends I recently installed I9300XXUGMJ9_I9300VFGGMJ5_VDI_2.tar (Android 4.3) on my Galaxy S III International version. But as we know the firmware is full of messy bugs I just installed the old 4.1.2 firmware from Samsmobile and kies too.. But the problem is that I can't access my network. There seems to be only emergency calls... Can you guys get me this problem fixed? Is there any way to downgrade my phone to old 4.1.2 Jelly Bean. I desperately require some help.
Please use search question asked daily .
Please read faqs and guides .
Please post in the correct forum .
Basics read first.
http://forum.xda-developers.com/showthread.php?t=2344125
Critical you read the first two posts .
Install neatrom 5.4 working great
Sent from my GT-I9300 using xda premium
ozzyblack said:
Install neatrom 5.4 working great
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Provide the link please. Is it 4.1.2?
yes ..u have to flash modem
featherknox said:
Dear friends I recently installed I9300XXUGMJ9_I9300VFGGMJ5_VDI_2.tar (Android 4.3) on my Galaxy S III International version. But as we know the firmware is full of messy bugs I just installed the old 4.1.2 firmware from Samsmobile and kies too.. But the problem is that I can't access my network. There seems to be only emergency calls... Can you guys get me this problem fixed? Is there any way to downgrade my phone to old 4.1.2 Jelly Bean. I desperately require some help.
Click to expand...
Click to collapse
flash this modem xxemj4.....google it.....or u can try imperium 4.1.2 rom
try Gorgoid 2.7a. MJ2 firmware with MJ1 modem. i flashed over CM11 and all good.
http://forum.xda-developers.com/showthread.php?t=2172299
Thanks
ozzyblack said:
Install neatrom 5.4 working great
Sent from my GT-I9300 using xda premium
Click to expand...
Click to collapse
Thanks dear, I have installed NeatRom Full.
The lag in the lockscreen has gone away so far... Though there the UI is still the same...
It feels as if no change has been made at all....
Looking For 4.1.2
In fact I was looking for a solution to switch back to Custom 4.1.2 as it was the perfect ROM so far for me.
I have downloaded it from Sammobile but after Installing it via Odin I am unable to see any network and the Phone's IMIE is changed. I would greatly appreciate anyone to come up with solution for that....
Thanks everyone for being so kind...
featherknox said:
In fact I was looking for a solution to switch back to Custom 4.1.2 as it was the perfect ROM so far for me.
I have downloaded it from Sammobile but after Installing it via Odin I am unable to see any network and the Phone's IMIE is changed. I would greatly appreciate anyone to come up with solution for that....
Thanks everyone for being so kind...
Click to expand...
Click to collapse
read JJEgan's response.
DO IT!
I had the same problem, and all I did was to get to cm 10.2 before moving back to 4.1.2 stock
Sent from my GT-I9300 using xda app-developers app
Was it helpful?
thunderror said:
I had the same problem, and all I did was to get to cm 10.2 before moving back to 4.1.2 stock
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
I also tried to install the CM via its official Windows Application. When it completed there was no network again... Can you provide me the link of the ROM that you installed? Is it Zipaligned?
@featherknox
Correct me if i'm wrong but maybe u have a problem with efs partition from downgrading unto lower version of android..
here are some post that some of the users have solved their problem..
http://forum.xda-developers.com/showpost.php?p=47524551&postcount=1148
let us know if it works to you..
Thanks
Warrenforfree said:
@featherknox
Correct me if i'm wrong but maybe u have a problem with efs partition from downgrading unto lower version of android..
here are some post that some of the users have solved their problem..
http://forum.xda-developers.com/showpost.php?p=47524551&postcount=1148
let us know if it works to you..
Click to expand...
Click to collapse
Thank you very much.. I am going to give it a try.... Hope it works...
Problem Solved
Dear guys thanks for your time and the help...
With suggestion of a good mate, I am finally able to go back to 4.1.2.....
All I had to do was just Install the Patched Modem MG4
<b> https://www.dropbox.com/s/geispctijpxqjms/Patched_Modem_I9300XXEMG4.zip </b>
Wow,, I am so happy to get rid of that stupid 4.3
featherknox said:
Dear friends I recently installed I9300XXUGMJ9_I9300VFGGMJ5_VDI_2.tar (Android 4.3) on my Galaxy S III International version. But as we know the firmware is full of messy bugs I just installed the old 4.1.2 firmware from Samsmobile and kies too.. But the problem is that I can't access my network. There seems to be only emergency calls... Can you guys get me this problem fixed? Is there any way to downgrade my phone to old 4.1.2 Jelly Bean. I desperately require some help.
Click to expand...
Click to collapse
Check your IMEI number, wheather it was changed to 0049XXXX - I have had the same problem. I downloaded from Sammobile firmware v4.3 and flash your phone with odin. My IMEI and network connection was restored. Looks like Samsung does not like us to downgrade the firmwares.
Problem Solved
Peter1234 said:
Check your IMEI number, wheather it was changed to 0049XXXX - I have had the same problem. I downloaded from Sammobile firmware v4.3 and flash your phone with odin. My IMEI and network connection was restored. Looks like Samsung does not like us to downgrade the firmwares.
Click to expand...
Click to collapse
I have downgraded my Phone. Check the solution into my New Thread!!!!!
http://forum.xda-developers.com/showthread.php?p=47555014#post47555014
Peter1234 said:
Check your IMEI number, wheather it was changed to 0049XXXX - I have had the same problem. I downloaded from Sammobile firmware v4.3 and flash your phone with odin. My IMEI and network connection was restored. Looks like Samsung does not like us to downgrade the firmwares.
Click to expand...
Click to collapse
Its not a problem if users care to read the faqs and guides first .
Solution.....
Hello guys....
I am very thankful to the xda forum and all the members who helped me to get through a serious problem..
Recently I installed 4.3 Leaked version on my GT-I9300 and the ROM proved to be worst ROM of life. So I decided to go back to 4.1.2.
I installed the custom ROM via Odin but I confronted a serious issue, when I was finished the installation I found that there was no network at all... Samsung's official told me that it is impossible to reverse the Android version...
I had no clue what to do. I flashed many ROMs but no solution at all. My IMIE was also kinda jumbled..
Many guys said it is EFS issue... But it is not EFS issue...
It is all because of different Modem issue.. all you need to do is just install a clean custom ROM from http://www.sammobile.com/firmwares/2/ and Install the patched modem... you are done..
So here is the solution:
1. Download your desired CUSTOM ROM for your Country from Sammobile...
Link http://www.sammobile.com/firmwares/2/
2. Install the ROM via Odin
3. Root it and Install your favorite recovery.
4. Install the Patched MG4 Modem Zip in Recovery Mode. Link https://www.dropbox.com/s/geispctijp...9300XXEMG4.zip
You are done....
This problem is all about MODEM version, so I don't think if EFS tricks are involved here.....
Finally credits go to all the XDA Members who put their heart and soul to present all the required guidance for me to be able to downgrade to lower Android Version.. I have only compiled the whole stuff into a single thread....
Thanks,,,
Plenty of solutions....
JJEgan said:
Its not a problem if users care to read the faqs and guides first .
Click to expand...
Click to collapse
Dear sir,
Actually the problem is not finding the solutions but finding the right solution.
Worth members of XDA Forum post a lot of solutions for a particular problem and thus newbies like me get even more confused... So it definitely takes some time for us to come to a point when we are able to get the desired results.
Sometimes, we are not able to clarify our queries.....
As in my problem only a Modem was required while I was looking for EFS solutions!
After Flashing the MG4 modem my battery life has become worst. I don't know if it is because of the Modem.. but whenever my phone is on airplane mode then the battery remains at the same percentage but while on network my battery keeps on draining without even texting or calling
Sent from my GT-I9300 using XDA Premium 4 mobile app

after upgrading to 4.3 bsed rom

after flashing 4.3 baeds rom and failed to start..i managed to flash new firmware 4.1.2 with odin..but after starting up..my phone doesnt have network(not registerd network) and my serial written like that 00004400****.. then trying to do a full wipe and re-flashed the firmware again..also no network...how can i fix that plz ????
zeyadrani said:
after flashing 4.3 baeds rom and failed to start..i managed to flash new firmware 4.1.2 with odin..but after starting up..my phone doesnt have network(not registerd network) and my serial written like that 00004400****.. then trying to do a full wipe and re-flashed the firmware again..also no network...how can i fix that plz ????
Click to expand...
Click to collapse
please read the stickies in general sections and search first, I think half of the >1000 threads here in Q&A section are filled with the same question
http://forum.xda-developers.com/showthread.php?t=2393289
I hope you have an efs backup. if not follow the steps in the linked thread.
btw which 4.1.2 did you flash. when you flash 4.3 rom efs will change to v2 so you need a rom with efs v2 baseband (everything newer than xeemg4)
zeyadrani said:
after flashing 4.3 baeds rom and failed to start..i managed to flash new firmware 4.1.2 with odin..but after starting up..my phone doesnt have network(not registerd network) and my serial written like that 00004400****.. then trying to do a full wipe and re-flashed the firmware again..also no network...how can i fix that plz ????
Click to expand...
Click to collapse
Read this post 1441: http://forum.xda-developers.com/showthread.php?p=48578725#post48578725
It works for me.
Darkened_Sky said:
please read the stickies in general sections and search first, I think half of the >1000 threads here in Q&A section are filled with the same question
http://forum.xda-developers.com/showthread.php?t=2393289
I hope you have an efs backup. if not follow the steps in the linked thread.
btw which 4.1.2 did you flash. when you flash 4.3 rom efs will change to v2 so you need a rom with efs v2 baseband (everything newer than xeemg4)
Click to expand...
Click to collapse
i flashed stock firmware 4.1.2
zeyadrani said:
i flashed stock firmware 4.1.2
Click to expand...
Click to collapse
yeah I know but which one (the build number) something like XXELLA or XXEMG4...? you can see it in settings menu
in fact if you have flashed a firmware older than XXEMG4 then also its baseband is flashed, and these old basebands are not compatible with efs v2 which has been flashed through your sammy 4.3 update.
This could PROBABLY have caused your imei problem and you would only have to flash a baseband newer than XXEMG4 to PROBABLY solve it. or your efs is corrupt than you should follow the steps in the stickies
Darkened_Sky said:
yeah I know but which one (the build number) something like XXELLA or XXEMG4...? you can see it in settings menu
in fact if you have flashed a firmware older than XXEMG4 then also its baseband is flashed, and these old basebands are not compatible with efs v2 which has been flashed through your sammy 4.3 update.
This could PROBABLY have caused your imei problem and you would only have to flash a baseband newer than XXEMG4 to PROBABLY solve it. or your efs is corrupt than you should follow the steps in the stickies
Click to expand...
Click to collapse
U dun have to flash a modem NEWER than xxemg4. U nid to flash xxemg4 modem and its okay alr. Mg4 modem will work.
Sent from my GT-I9300 using xda app-developers app
Give a thank if I helped you
Darkened_Sky said:
yeah I know but which one (the build number) something like XXELLA or XXEMG4...? you can see it in settings menu
in fact if you have flashed a firmware older than XXEMG4 then also its baseband is flashed, and these old basebands are not compatible with efs v2 which has been flashed through your sammy 4.3 update.
This could PROBABLY have caused your imei problem and you would only have to flash a baseband newer than XXEMG4 to PROBABLY solve it. or your efs is corrupt than you should follow the steps in the stickies
Click to expand...
Click to collapse
will it work if i flashed XXELLA then restored my efs ?!!
zeyadrani said:
will it work if i flashed XXELLA then restored my efs ?!!
Click to expand...
Click to collapse
so the firmware you have flashed is XXELLA?
and do you have an efs backup or not? (sorry I do not really understand your sentence)
Thaaaaaanks I have solved that....my imiel and sn is back
Sent from my GT-I9300 using xda premium

Have network icon, but not registered, have IMEI

I haved rooted stock rom. But i just unrooted and put same unrooted stock rom with mobile odin. Tried factory restart and cache clear.
Phone boots normaly and show network signal, but can't call or recive calls. Say "not registered". I tried to manualy choose operater but nothing.
My IMEI number is original but serial number is 000000.. When call myself from another phone it is not out service but S3 not show call.
Model GT-I9300
Android version 4.1.2
Baseband I9300XXELLA
What I can do? Update firmware?
I have backup of EFS.
webmar said:
I haved rooted stock rom. But i just unrooted and put same unrooted stock rom with mobile odin. Tried factory restart and cache clear.
Phone boots normaly and show network signal, but can't call or recive calls. Say "not registered". I tried to manualy choose operater but nothing.
My IMEI number is original but serial number is 000000.. When call myself from another phone it is not out service but S3 not show call.
Model GT-I9300
Android version 4.1.2
Baseband I9300XXELLA
What I can do? Update firmware?
I have backup of EFS.
Click to expand...
Click to collapse
First of all try unbackup EFS(in G-play there are some tools,i prefer K-Tool).If there is more issues try custom ROM with patched modem and patched kernel. If you prefer read this: post 1441 : http://forum.xda-developers.com/showthread.php?p=48578725#post48578725
west421 said:
First of all try unbackup EFS(in G-play there are some tools,i prefer K-Tool).If there is more issues try custom ROM with patched modem and patched kernel. If you prefer read this: post 1441 : http://forum.xda-developers.com/showthread.php?p=48578725#post48578725
Click to expand...
Click to collapse
I have stock rom. Can I restore efs folder with same method that keep unrooted phone?
I dont now what is problem, I used identicaly rom only unrooted.
webmar said:
I have stock rom. Can I restore efs folder with same method that keep unrooted phone?
I dont now what is problem, I used identicaly rom only unrooted.
Click to expand...
Click to collapse
OK it is so complicated to explane but read this tread: http://forum.xda-developers.com/showthread.php?t=2393289
west421 said:
OK it is so complicated to explane but read this tread: http://forum.xda-developers.com/showthread.php?t=2393289
Click to expand...
Click to collapse
I readed that and it is not like my problem. I have original IMEI. Does official kies update help?
webmar said:
I readed that and it is not like my problem. I have original IMEI. Does official kies update help?
Click to expand...
Click to collapse
Try then this patch it work for broken SN. http://forum.xda-developers.com/showthread.php?t=1918601
west421 said:
Try then this patch it work for broken SN. http://forum.xda-developers.com/showthread.php?t=1918601
Click to expand...
Click to collapse
Thanks, but this patch I must use every time I update phone. I haved rooted phone, but I want normal, unrooted phone to use updates.
Does anybody alse now how to fix? Maybe modem or update?
Does flashing new version of stock rom will help? Is efs backup just for IMEI problems or can help with s/n 0000?
Any help?
why don't you try to just update your firmware to 4.3 (choose 4.3 stock roms) to quickly fix those issues.
BennyZars said:
why don't you try to just update your firmware to 4.3 (choose 4.3 stock roms) to quickly fix those issues.
Click to expand...
Click to collapse
I dont have official 4.3 for my country. Maybe same MG4 firmware?
Just root your s3 and then dpwnload XXEMG4 modem for s3 and apply that modem from recovery mode..it will be fixed..
Sent from my GT-I9300 using xda app-developers app
[email protected] said:
Just root your s3 and then dpwnload XXEMG4 modem for s3 and apply that modem from recovery mode..it will be fixed..
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
But he wants to receive ota. Which I dun understand lol. Custom roms are btr
Sent from my GT-I9300 using xda app-developers app
Give a thank if I helped you
JellyYogurt said:
But he wants to receive ota. Which I dun understand lol. Custom roms are btr
Sent from my GT-I9300 using xda app-developers app
Give a thank if I helped you
Click to expand...
Click to collapse
Yes, I want stock unrooted rom that works and update. I used a lot custom roms on another phone, my old htc
webmar said:
Yes, I want stock unrooted rom that works and update. I used a lot custom roms on another phone, my old htc
Click to expand...
Click to collapse
Root ur fone. Flash mg4 modem. Unroot. I think it will work.
Sent from my GT-I9300 using xda app-developers app
Give a thank if I helped you
I rooted phone again. Maybe help to flash stock MG4 firmware not just modem?
nevermind
BennyZars said:
nevermind
Click to expand...
Click to collapse
Yes, I know that I will dwnload this version for my operater
PDA: I9300XXEMG4
CSC: I9300OXFEMG2
MODEM: I9300XXEMG4
I hope that will help...
webmar said:
Yes, I know that I will dwnload this version for my operater
PDA: I9300XXEMG4
CSC: I9300OXFEMG2
MODEM: I9300XXEMG4
I hope that will help...
Click to expand...
Click to collapse
oh sorry. i edited my first post which is this:
"""
First you need to find the right rom for you
go to sammobile.com (register first in able for you to download stock roms) click firmwares, choose your phone gt19300 and your country. It will display the list of stock roms. choose the rom that you like and then check the modem version the last three figures should be MG4 (for 4.1.2)
if you already have the rom then follow this guide on how to flash with odin:
http://forum.xda-developers.com/show....php?t=1671969""
and i changed it to "nevermind" because i don't know how to delete messages and you already know how to do it because you already flashing custom roms before.
BennyZars said:
oh sorry. i edited my first post which is this:
"""
First you need to find the right rom for you
go to sammobile.com (register first in able for you to download stock roms) click firmwares, choose your phone gt19300 and your country. It will display the list of stock roms. choose the rom that you like and then check the modem version the last three figures should be MG4 (for 4.1.2)
if you already have the rom then follow this guide on how to flash with odin:
http://forum.xda-developers.com/show....php?t=1671969""
and i changed it to "nevermind" because i don't know how to delete messages and you already know how to do it because you already flashing custom roms before.
Click to expand...
Click to collapse
I know how to flash, I used mobile Odin because haved problem with usb port.

[Q] Please help, I can't find clear answer

Hello
My friend bought GS3 months ago in Arabic country with ICS 4.0.4 installed. When I saw the box, I found that the GS3 is a grey market product. It has Region Lock label written in Russian language on the box and the ROM is pre-rooted CWM Custom ROM
Now, Kies dose not upgrade this version and he wishes to have Arabic stock ROM 4.3 if possible. What are the safest steps to do?
- If I download and flash Arabic stock ROM, will I loose modem connectivity?
- Do I need to backup and restore EFS data if I flash stock ROM?
- Do I need root to restore EFS data/modem driver after flashing STOCK ROM?
- Should I flash custom ROM instead of Stock ROM?
I want a safe way, I don't wish to cause network/EFS loss to the device?
I read a lot but came to no conclusion.. please help
Hello
My friend bought GS3 months ago in Arabic country with ICS 4.0.4 installed. When I saw the box, I found that the GS3 is a grey market product. It has Region Lock label written in Russian language on the box and the ROM is pre-rooted CWM Custom ROM
Now, Kies dose not upgrade this version and he wishes to have Arabic stock ROM 4.3 if possible. What are the safest steps to do?
- If I download and flash Arabic stock ROM, will I loose modem connectivity?
- Do I need to backup and restore EFS data if I flash stock ROM?
- Do I need root to restore EFS data/modem driver after flashing STOCK ROM?
- Should I flash custom ROM instead of Stock ROM?
I want a safe way, I don't wish to cause network/EFS loss to the device?
I read a lot but came to no conclusion.. please help
Click to expand...
Click to collapse
Kies shld have an emergency firmware feature. Try using it.
1. U will not. Just dun downgrade
2. If u aren't gg back to 4.1.2, dun bother. But recommended.
3. Yes.
4. Ur choice. If u wan bugless rom, go for stock rom. Many also say stock is one of the best.
Sent from my GT-I9300 using xda app-developers app
JellyYogurt said:
Kies shld have an emergency firmware feature. Try using it.
1. U will not. Just dun downgrade
2. If u aren't gg back to 4.1.2, dun bother. But recommended.
3. Yes.
4. Ur choice. If u wan bugless rom, go for stock rom. Many also say stock is one of the best.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
Thanks for reply. I read that some people lost the IMEI when they flashed STOCK ROM 4.3? as I said the device came from Russian market and I want to flash Middle east ROM?
Which JB version is save to flash and won't loose the IMEI?
xIndex said:
Thanks for reply. I read that some people lost the IMEI when they flashed STOCK ROM 4.3? as I said the device came from Russian market and I want to flash Middle east ROM?
Which JB version is save to flash and won't loose the IMEI?
Click to expand...
Click to collapse
If u are rly just tat scared to lose ur imei. Go kies and do the firmware recovery. U will get stock rom automatically.
Sent from my GT-I9300 using xda app-developers app
Depends on the phone history on what will happen on upgrade to 4.3, sim lock may return or imei lost due to patched efs folder. No way to know until you get flash, so backup efs now.
4.1.2 EMG4 is when efs format changed, anything before this shouldn't cause too many issues.
Sent from my GT-I9300 using Tapatalk
boomboomer said:
Depends on the phone history on what will happen on upgrade to 4.3, sim lock may return or imei lost due to patched efs folder. No way to know until you get flash, so backup efs now.
4.1.2 EMG4 is when efs format changed, anything before this shouldn't cause too many issues.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
That's what I am worried about. To loose IMEI or get the region lock back. The phone model is GT-I9300RWDEUR. Can I find stock rom for it with no region lock?
so confusing !!
JellyYogurt said:
If u are rly just tat scared to lose ur imei. Go kies and do the firmware recovery. U will get stock rom automatically.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
I am worried I will get back the region lock crap if I do firmware recovery!!
The model is GT-I9300RWDEUR European SIM model
The ICS 4.0.0 is causing to many problems and device hangs all the time
Actually it is from Greece. I was confused with the language (Ελβετία= Swiss)
boomboomer said:
Depends on the phone history on what will happen on upgrade to 4.3, sim lock may return or imei lost due to patched efs folder. No way to know until you get flash, so backup efs now.
4.1.2 EMG4 is when efs format changed, anything before this shouldn't cause too many issues.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
So if I upgrade to 4.1.2 before EMG4 , I won't have EFS/IMEI problem?
All I have to do to flash midle east ROM and then to find the Modem driver and install it through odin?
xIndex said:
So if I upgrade to 4.1.2 before EMG4 , I won't have EFS/IMEI problem?
All I have to do to flash midle east ROM and then to find the Modem driver and install it through odin?
Click to expand...
Click to collapse
Modem may be a CWM zip not a tar .
JJEgan said:
Modem may be a CWM zip not a tar .
Click to expand...
Click to collapse
What is the difference? Odin only flashes tar?
I need to find modem driver in tar format first?
Odin flashes tar
CWM and other custom recovery flashes zips .
Suggest you read the basic faqs and guides first .
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
Thanks for the info.
I found UAE ROM that uses the same Greece Modem number. Is it safe to flash it?
http://www.sammobile.com/firmwares/3/?download=25063
http://www.sammobile.com/firmwares/3/?download=23767

[Q] I have an S3 and I want to go back to 4.1.2

Hi,
I just upgraded my Galaxy s3 (i9300) to 4.3.
I hate this update, I want to go back to 4.1.2
Can anyone please help me with a safe method to achieve this..
You can downgrade using Odin. Get your preferred stock ROM version from www.sammobile.com, then flash it using Odin to the phone.
Just a word of advice, get a 4.1.2 firmware with mg4 baseband or higher to avoid efs and imei corruption.
dxppxd said:
Just a word of advice, get a 4.1.2 firmware with mg4 baseband or higher to avoid efs and imei corruption.
Click to expand...
Click to collapse
Thank you for your response. I have attached a screenshot of the version I selected from sammobile.com, kindly check.
I checked online and found that downgrading from 4.3 could corrupt the EFS and IMEI as you told.
In order to backup these I need to use EFS PROFESSIONAL (which requires root, but mine isn't rooted.)
I have a question. Like you said I have selected the most current version of 4.1.2 (in which PDA says : I9300XXEMH4) released on sammobile just before the current 4.3
Can you kindly confirm if I can proceed without rooting my phone in order to downgrade it to 4.1.2 ( without running into EFS or EMEI issues)
In other words, Can I proceed through odin and downgrade to 4.1.2 without any EFS issues with the firmware version I have selected?
I really appreciate all your support, please help..
Saad_ said:
You can downgrade using Odin. Get your preferred stock ROM version from sammobile dot com, then flash it using Odin to the phone.
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Thank you for your response. Could you kindly provide me a response based on my query mentioned below to "dxppxd"
I really appreciate your support guys..
jinofaero said:
Thank you for your response. Could you kindly provide me a response based on my query mentioned below to "dxppxd"
I really appreciate your support guys..
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You can always flash a proper modem if you mess the IMEI up. And the version you selected looks ok.

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