[Q] how can i downgrade to 4.1.2? - Galaxy S II Q&A, Help & Troubleshooting

I have samsung galaxy s2 i9100. and whenever i switched to 4.2.2 with CM rom. 3G didnt work at all. i posted a thread but no answers. so i dont know how to downgrade a version.i tried flashing with odin but didnt work. so what are the steps that i need to downgrade?
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Fractrox said:
I have samsung galaxy s2 i9100. and whenever i switched to 4.2.2 with CM rom. 3G didnt work at all. i posted a thread but no answers. so i dont know how to downgrade a version.i tried flashing with odin but didnt work. so what are the steps that i need to downgrade?
.
Click to expand...
Click to collapse
download neatrom lite 4.7.zip and format data/system/preload/cache partitions in recovery. and flash the neatrom zip from recovery and reboot. it includes modem, kernel and rom.
http://d-h.st/UIK here is the link.

my two cents
Fractrox said:
I have samsung galaxy s2 i9100. and whenever i switched to 4.2.2 with CM rom. 3G didnt work at all. i posted a thread but no answers. so i dont know how to downgrade a version.i tried flashing with odin but didnt work. so what are the steps that i need to downgrade?
.
Click to expand...
Click to collapse
Hi Fractrox,
Did you do a factory reset after flashing CM rom? If yes, try adding the APNs again under
Settings-> More-> Mobile Networks -> Access Point Names, followed by a reboot.
For downgrading , you can find stock rom from sammobile for s2. The latest released is 4.1.2.
Check your location and flash the one for your country so that you get the correct modem file which will help fixing the 3G connection issues.
Hope it helps.
Cheers,
Maddy

i was going to say flash a stock rom via odin, but he said he has had no luck with odin?
and he says he is running cm10.1 already so i know he has cwm, thats why i said neatrom lite...as its less bloated and is rooted, with philz kernel etc,

coolmaddy007 said:
Hi Fractrox,
Did you do a factory reset after flashing CM rom? If yes, try adding the APNs again under
Settings-> More-> Mobile Networks -> Access Point Names, followed by a reboot.
For downgrading , you can find stock rom from sammobile for s2. The latest released is 4.1.2.
Check your location and flash the one for your country so that you get the correct modem file which will help fixing the 3G connection issues.
Hope it helps.
Cheers,
Maddy
Click to expand...
Click to collapse
thanks but that didnt work so i geuss im going to downgrade to 4.1.2 with neatrom

Fractrox said:
thanks but that didnt work so i geuss im going to downgrade to 4.1.2 with neatrom
Click to expand...
Click to collapse
i have downgraded from cm10.1 to neatrom many times.
good luck.
just remember to format system/preload/cache and data..and then flash neatrom lite from your sd card. let me know if you need any more help.
i'll be on xda for about another hour, then i have to go.

Didn't work. I downgraded but there was no 3G or ROM only kernel. and why does 3G works with stock ROM as the other guy said?
Sent from my GT-I9100 using xda app-developers app

Related

I need help with 2 Australian Galaxy S3

Hi. I have 2 australian galaxy s3. First one is on 4.1.2 TDUELL2 and the second one is on 4.0.4 TDUBLH1. I want to root both of them. The first one after getting updated to 4.1.2 wifi stopped working but i found a fix installing the wifi folder from 4.1.1 version. To that I need root though. So any help on how am I gonna root them both? Cause I couldn't sort it out my self.
jimskeet2002 said:
Hi. I have 2 australian galaxy s3. First one is on 4.1.2 TDUELL2 and the second one is on 4.0.4 TDUBLH1. I want to root both of them. The first one after getting updated to 4.1.2 wifi stopped working but i found a fix installing the wifi folder from 4.1.1 version. To that I need root though. So any help on how am I gonna root them both? Cause I couldn't sort it out my self.
Click to expand...
Click to collapse
What model number are the phones I9300 / I9305?
they are i9300t
I managed to root both of them. I know have a major problem. 1 of them had a problem with wifi. It couldnt connect. I read about a solution by copying the wifi folder from version 4.1.1. Tried that. It worked for once but after reboot it stopped. And now I can't even turn on the wifi. It gets stuck on Turning on... Do i have to reflash the rom again and if so how will i do that? It was stock rom on stock kernel. Only rooted. gt i9300t moder and build DUELL2.
Also can i flash a rom with different build over that? For example XXEMC2 that i have on my Greek galaxy s3?
I9300T rooting is the same as I9300 rooting, follow the guides of CF-Root 6.4 or CF-Autoroot. (I got a T model myself)
You can flash any I9300 rom also on the T model, therefore root is not 100% necessary. Full wipes are recommended for flashing different versions though.
chrismast said:
I9300T rooting is the same as I9300 rooting, follow the guides of CF-Root 6.4 or CF-Autoroot. (I got a T model myself)
Click to expand...
Click to collapse
I did root them. Now my problem is that on one of them wifi isn't working. Check my previous post again
jimskeet2002 said:
I did root them. Now my problem is that on one of them wifi isn't working. Check my previous post again
Click to expand...
Click to collapse
just saw it .
For wifi, try a stock ROM (flash it new incl. wipes etc.), or try a different kernel, whereas the stock kernel should always work.
chrismast said:
just saw it .
For wifi, try a stock ROM (flash it new incl. wipes etc.), or try a different kernel, whereas the stock kernel should always work.
Click to expand...
Click to collapse
Can you tell me how i will flash a new stock rom on it? where can i find the stock rom and can i flash a different build?
DUELL2 is the current.
jimskeet2002 said:
Can you tell me how i will flash a new stock rom on it? where can i find the stock rom and can i flash a different build?
DUELL2 is the current.
Click to expand...
Click to collapse
you can find (unrooted) stock roms for instance on sammobile.com or (rooted) stock roms here on XDA in the General section.
Easiest way to flash them is via Mobile Odin (gives you the option to keep root) or Odin (you will loose root but you can flash CF afterwards manually).
And yes you can flash any build that is made for the I9300/I9300T.
The only difference between both models is the frequency of the baseband (the T model is more optimized for 850mhz) whereas you even can use modems of the I9300 on the I9300T.
chrismast said:
you can find (unrooted) stock roms for instance on sammobile.com or (rooted) stock roms here on XDA in the General section.
Easiest way to flash them is via Mobile Odin (gives you the option to keep root) or Odin (you will loose root but you can flash CF afterwards manually).
And yes you can flash any build that is made for the I9300/I9300T.
The only difference between both models is the frequency of the baseband (the T model is more optimized for 850mhz) whereas you even can use modems of the I9300 on the I9300T.
Click to expand...
Click to collapse
What do you mean by modems? Soz if I sound noob but I am new to Galasy s3. My previous android was ideos x5 and i had a miui rom on it.
The phone will be used in greece. Do you suggest me flashing the XXEMC2 rom that i have on my Greek S3 atm? Is there any chance of bricking it if i flash that rom on it?
jimskeet2002 said:
What do you mean by modems? Soz if I sound noob but I am new to Galasy s3. My previous android was ideos x5 and i had a miui rom on it.
The phone will be used in greece. Do you suggest me flashing the XXEMC2 rom that i have on my Greek S3 atm? Is there any chance of bricking it if i flash that rom on it?
Click to expand...
Click to collapse
There is a difference between the ROM's firmware (basically your OS, e.g. XXEMC2) and the modem (basically the part which gives you the connection to the next mobile tower and is managing the frequencies, e.g. DUELL2).
It does not matter that much what ROM firmware you use as they are nearly identical in each country (here and there dif. apps due to providers) but more that you use a modem that delivers in the country you are in. Hence, I would first try the modems of your region (you can find a list of all modems in the General section's modem collection).
Regarding the risk of bricking: there is always a risk, no one can guarantee you anything , whereas if you follow the guides you should be fine.
chrismast said:
There is a difference between the ROM's firmware (basically your OS, e.g. XXEMC2) and the modem (basically the part which gives you the connection to the next mobile tower and is managing the frequencies, e.g. DUELL2).
It does not matter that much what ROM firmware you use as they are nearly identical in each country (here and there dif. apps due to providers) but more that you use a modem that delivers in the country you are in. Hence, I would first try the modems of your region (you can find a list of all modems in the General section's modem collection).
Regarding the risk of bricking: there is always a risk, no one can guarantee you anything , whereas if you follow the guides you should be fine.
Click to expand...
Click to collapse
Ok. Here is the deal. My greek galaxy s3 which i recently updated is XXEMC2. The galaxy s3 with the wifi problem is DUELL2 bought in australia from a friend but will be sent to greece for my brother. So i should flash XXEMC2 on it? I just download XXEMC2 from sammobile and flash it with odin? It doesn't matter that the XXEMC2 is for i9300 as fas as I understood from what u said. right?
jimskeet2002 said:
Ok. Here is the deal. My greek galaxy s3 which i recently updated is XXEMC2. The galaxy s3 with the wifi problem is DUELL2 bought in australia from a friend but will be sent to greece for my brother. So i should flash XXEMC2 on it? I just download XXEMC2 from sammobile and flash it with odin? It doesn't matter that the XXEMC2 is for i9300 as fas as I understood from what u said. right?
Click to expand...
Click to collapse
correct, you can use the I9300 versions of any rom for the I9300T as well.
chrismast said:
correct, you can use the I9300 versions of any rom for the I9300T as well.
Click to expand...
Click to collapse
Ok. So the CSC numbers that are different on lets say the DUELL2 and the XXEMC2 are not something to bother me right? I just download the XXEMC2 rom and flash it on the DUELL2 S3 and then I just will root it. right? Will the phone become i9300 after that procedure? or stay i9300t? So I know which file i should use to root it.
Soz for too many questions but the phone is not mine and I need to be sure for the procedure.
jimskeet2002 said:
Ok. So the CSC numbers that are different on lets say the DUELL2 and the XXEMC2 are not something to bother me right? I just download the XXEMC2 rom and flash it on the DUELL2 S3 and then I just will root it. right? Will the phone become i9300 after that procedure? or stay i9300t? So I know which file i should use to root it.
Soz for too many questions but the phone is not mine and I need to be sure for the procedure.
Click to expand...
Click to collapse
The firmware code (XXEMC2) should not be of concern.
The modem code (DUELL2) should be of concern IF you experience bad performance in the region you are. If so, flash a different modem and try it.
The phone will be an I9300T whereas in the menus it might tell you I9300, anyway there is no difference in the files to use.
For rooting, follow the guide, you can use CF-Root 6.4 (if you want a custom recovery) or CF-Autoroot (if you want to use stock recovery).
chrismast said:
The firmware code (XXEMC2) should not be of concern.
The modem code (DUELL2) should be of concern IF you experience bad performance in the region you are. If so, flash a different modem and try it.
The phone will be an I9300T whereas in the menus it might tell you I9300, anyway there is no difference in the files to use.
For rooting, follow the guide, you can use CF-Root 6.4 (if you want a custom recovery) or CF-Autoroot (if you want to use stock recovery).
Click to expand...
Click to collapse
Thanks a lot mate. This helped a lot. I decided to go with the 4.1.1 version of its current region. Later if we see that it doesnt perform well here in greece we will flash the xxemc2 rom.
Ok i downloaded the rom from sammobile and the file name is this I9300TDUDLK1_I9300ZZZLK1_VAU.zip but i get an error message that says cannot open. file unknown or damaged :/ Why is that? Is this file meant to be named as md5?
jimskeet2002 said:
Ok i downloaded the rom from sammobile and the file name is this I9300TDUDLK1_I9300ZZZLK1_VAU.zip but i get an error message that says cannot open. file unknown or damaged :/ Why is that? Is this file meant to be named as md5?
Click to expand...
Click to collapse
To flash a rom via odin you need the md5 file, correct. Hence unzip or if you cannot maybe the download is corrupt?
Sent from my GT-I9300 using xda app-developers app
chrismast said:
To flash a rom via odin you need the md5 file, correct. Hence unzip or if you cannot maybe the download is corrupt?
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
The zip file was probably corrupted. we will download the greek version XXELLA after al...l. Cross fingers for success
btw should i make an efs backup to be surr???
and how can i do that?
Will this http://www.androidauthority.com/galaxy-s3-backup-restore-efs-imei-tool-122078/ work?
I did it on my greek galaxy s3 and ended up witha 20mb efs.img
Sent from my GT-I9300 using xda app-developers app
jimskeet2002 said:
btw should i make an efs backup to be surr???
and how can i do that?
Will this http://www.androidauthority.com/galaxy-s3-backup-restore-efs-imei-tool-122078/ work?
I did it on my greek galaxy s3 and ended up witha 20mb efs.img
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
Yes, definitely backup your efs! Search for it and you will find tons of guides.
Sent from my GT-I9300 using xda app-developers app

HELP ME PLEASE! Downgrade SGS3 JB 4.3(Ireland) to stock 4.1.2 :(((( NEED IT SO BAD!

Guys. please hel me. I'm noob in android and I'm new in XDA.I updated my Samsung Galaxy Siii GT-I9300 to a leaked version of JB4.3(Ireland) and I regret it. It eats up my battery so fast and it has some bugs including the music player when locked. I want to restore it to the Stock JB 4.1.2. But I've read some threads that downgrading will cause errors on IMEI/EFS thing ( I badly want to downgrade it and wait for the official release of the Firmware. Please HELP ME GUYSS!
First of all, is your device rooted?
vhngu930 said:
First of all, is your device rooted?
Click to expand...
Click to collapse
Nope. My GT-I9300 is not rooted. I flashed the leaked version of JB through Odin 3.09. it drains my battery. Huhu
noobdroiduser said:
Nope. My GT-I9300 is not rooted. I flashed the leaked version of JB through Odin 3.09. it drains my battery. Huhu
Click to expand...
Click to collapse
Flash the stock ROM through odin
vhngu930 said:
Flash the stock ROM through odin
Click to expand...
Click to collapse
Huhu. But the other threads states that downgrading will cause a problem with my Imei. And leads to no network thing. is there any other way? Or an specific ROM that wont cause that problem? Thanks for lending your time.
noobdroiduser said:
Huhu. But the other threads states that downgrading will cause a problem with my Imei. And leads to no network thing. is there any other way? Or an specific ROM that wont cause that problem? Thanks for lending your time.
Click to expand...
Click to collapse
I did have a GT-9300 and i could not remember how many times i flash up and down stock roms by ODIN and there was no error at all?
4.3 sucks bad...
Yes After downgrading to 4.1.2 My S3 (GT-I9300) does not show any Network. It is just a Emergency Call Only phone now.. Though after coming back to 4.3 again it works fine. I am also pissed off with this stupid update by Samsung. Please help if any buddy can...
Is it the official one from the Samsung website?
just downgrade it to 4.1.2 and flash a 4.1.2 modem, it will surely work.
Downgrade SGS3 4.3 to 4.1.2
I had similar issue upgraded to UK Stock 4.3 from Samfirmware ad had a terrible experience. I came across this 4.1.2 stock rom for Germany that worked with no issues as this one has MG4 modem that reads EFS2 partition newly implemented by Samsung,
Product Code: MBC
PDA: I9300XXEMG4
CSC: I9300MBCEMH1
MODEM: I9300XXEMG4
simply flash it through ODIN
http://www.hotfile.com/dl/250954845/08fe425/I9300XXEMG4_I9300MBCEMH1_MBC.zip.html
If your S3 doesn't reboot on its own, enter Recovery Mode by pressing Volume Up + Power + Home button simultaneously and then performing a Data Wipe/Factory Reset and wipe any cache partition. Then select Reboot System Now and you should be good to go.
Hope your problem will also solved as mine. Click Thanks if it works

[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

Downgrading from 4.3 to 4.2.1 and the No Network Issue...

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 Stock 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 Stock 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 Stock 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/geispctijpxqjms/Patched_Modem_I9300XXEMG4.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,,,
Custom rom from sammobile ???????since when have sam made custom roms .
STOCK ROM yes .
The Downgrading from 4.3 to 4.2.1 and the No Network Issue...
Is well posted in the faqs and guides for those that actually read them .
Sadly most are to lazy /
Sorry for the Wrong Term...
JJEgan said:
Custom rom from sammobile ???????since when have sam made custom roms .
STOCK ROM yes .
The Downgrading from 4.3 to 4.2.1 and the No Network Issue...
Is well posted in the faqs and guides for those that actually read them .
Sadly most are to lazy /
Click to expand...
Click to collapse
Sorry I wrote that mistakenly...... My bad...
Thanks for the guide you save me from a lot of work :good::good:
hugs
First time flashing a Samsung device, are there any risks involved in the above process i.e. wrong country and secondly, @featherknox why is a custom recovery required, is there no way to flash a stock rom straight over another stock rom with out it?
featherknox said:
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 Stock 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 Stock 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 Stock 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/geispctijpxqjms/Patched_Modem_I9300XXEMG4.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,,,
Click to expand...
Click to collapse
I can confirm that this method works. XEMB5 (4.1.2 stock rom) on top of the crappy 4.3 update, rooted it and then installed CWM. flashed the patch modem from the link he gave and the XEMB5 rom is working with network running again. but it seems like the battery is awful, 95% in just 10 minutes? lost 5 percent for that short amount of time -_-
then again, thanks for this!
Battery Drain
thehavoc said:
I can confirm that this method works. XEMB5 (4.1.2 stock rom) on top of the crappy 4.3 update, rooted it and then installed CWM. flashed the patch modem from the link he gave and the XEMB5 rom is working with network running again. but it seems like the battery is awful, 95% in just 10 minutes? lost 5 percent for that short amount of time -_-
then again, thanks for this!
Click to expand...
Click to collapse
Yes after flashing this modem the battery drains so quickly..
I am looking for any solution. Hopefully any developer would come with a good solution.
In battery system I see The Android System draining almost 25 to 30 percent of battery
I had the same issue, but with the help of xda , now everythings normal. but i have a question, with no oficial advances from samsung can i go back to flashing with no danger ?
thx , sorry for my english
Josemonteiro90 said:
I had the same issue, but with the help of xda , now everythings normal. but i have a question, with no oficial advances from samsung can i go back to flashing with no danger ?
thx , sorry for my english
Click to expand...
Click to collapse
My problem is little different. I can flash any ROM via Odin[DO NOT FORGET TO CHARGE YOUR MOBILE ABOVE 80% battery level!]:
1. Goto recovery by pressing "vo upl+home+power" release when you Samsung's bootloader.
2. Do factory reset/wipe everything.
3. Remove battery for 10secs. Then put it back.
4. Now press "vol down+home+power" to bring it into download mode. Then follow odin flashing procedure. It will work for any Samsung rom. No need to intall any custum roms.
Now going to my problems:
A. My s3 shuts down when it's idle.
B. Bluetooth button does not work. It tries to go to ON position but goes back OFF after 2/3 sec.
After downgrading from earlier 4.3 [SWC] I have even upgraded it with latest 4.1.2 xxemh4 but no luck!
Every thing works network, wi-fi etc. except above two problems!
Help me please!!
I FOUND SOMETHING, WHEN I DO *#1234* IT SAYS CSC: UNKNOWN though my network is ok and wi-fi works fine. Lemme try patching CSC as featherknox suggested!
@featherknox, But your patched modem can not be flashed in recovery[stock] mode as it says "Signature verification failed". HELP ME WHAT I SHOULD DO?
problem after flashing rom
why when i flashing that rom to downgrade from 4.3 to 4.2.1(ROM from sammobile) it stuck at samsung logo and always repeat the samsung logo. help me please. thanks
wannn97 said:
why when i flashing that rom to downgrade from 4.3 to 4.2.1(ROM from sammobile) it stuck at samsung logo and always repeat the samsung logo. help me please. thanks
Click to expand...
Click to collapse
first of all 4.2.1 or 4.1.2 ?
secondly have you wiped data/cache/dalvik cache and format system ?
Third did you try flashing any other supported kernels for your current android version ?
Galaxy S3 Updating causes Emergency Calls Only
Hi People i want to share my problem here which im facing from many days , I have updated My Galaxy S3 from Android 4.0 ICS to Offical Android 4.1.2 Jelly Bean for my country which i have downloaded from Sammobile via Odin After updating my phone im facing Emergency Calls only problem and also lost my IMEI which changed like 0049 i have searched many time on google nut cannot find a perfect solution for it plz any one help me it will be appriciatiable Thanx
Go read the efs thread in general forum, stickies.
Sent from my GT-I9300 using Tapatalk
Unknown baseband and null IMEI on samsung gs3 (I9300) after downgrading from 4.3
Dear All, pls give me a solution for my problem.
i have intl version of GS3 (I9300), recently i have updated my GS3 to 4.3 via ODIN then i have rooted my mobile to install slimbean rom. all was well until yesterday. but i decided to go back to 4.1.2 and flashed official ROM with baseband (MG4). from then onwards my mobile is showing sim not found, unknown baseband and null imei.
can anyone help me in solving this problem. thousand thanks in advance.
rajugsg2702 said:
Dear All, pls give me a solution for my problem.
i have intl version of GS3 (I9300), recently i have updated my GS3 to 4.3 via ODIN then i have rooted my mobile to install slimbean rom. all was well until yesterday. but i decided to go back to 4.1.2 and flashed official ROM with baseband (MG4). from then onwards my mobile is showing sim not found, unknown baseband and null imei.
can anyone help me in solving this problem. thousand thanks in advance.
Click to expand...
Click to collapse
Read my signature for your answer.
Sent from my GT-I9300 using Tapatalk
i will test this tuto, because i have the same problem , the generic imei 0049 etc.. i dont have the efs backup , i hope this make my s3 funcional
sorry for my ingles!
Edit
Not working for me.... any ideas?
boomboomer said:
Read my signature for your answer.
Sent from my GT-I9300 using Tapatalk
Click to expand...
Click to collapse
i am still waiting for solution to my problem. can anyone answer pls.
regards
rajugsg2702 said:
i am still waiting for solution to my problem. can anyone answer pls.
regards
Click to expand...
Click to collapse
Have You tried this solution by featherknox ??????
1. Download your desired Stock 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....
plz try this again and tell me if this works...
Muhammad Ameen said:
Have You tried this solution by featherknox ??????
1. Download your desired Stock ROM for your Country from Sammobile...
2. Install the ROM via Odin
3. Root it and Install your favorite recovery.
4. Install the Patched MG4 Modem Zip in Recovery Mode.
You are done....
plz try this again and tell me if this works...
Click to expand...
Click to collapse
it didnt work for me. i did the sameway as u have mentioned, i have even read featherknox posts in this forum but failed to bring back baseband version. pls suggest me what next
rajugsg2702 said:
it didnt work for me. i did the sameway as u have mentioned, i have even read featherknox posts in this forum but failed to bring back baseband version. pls suggest me what next
Click to expand...
Click to collapse
Read the faqs and guides or take to a service centre .

[Q] After flashing stock samsung rom, i have been stuck on emergency calls only,help?

Hi,
After flashing stock s3 rom my sim card is not being detected. i know the sim card works because i tried it on another phone and i have a feeling my efs file has been made corrupt as my imei has been completely changes to 0049xxxx. Also i cannot connect to any wifi network but theyre being found . ive looked everywhere and found no answer. Please help me on how i can fix it.
I'm guessing that you made no efs backup? Do your phone's cellular functions or wi-fi work while running a custom rom? What kind of GS3 do you own (i9300 or i9305?).
ArkThompson said:
I'm guessing that you made no efs backup? Do your phone's cellular functions or wi-fi work while running a custom rom? What kind of GS3 do you own (i9300 or i9305?).
Click to expand...
Click to collapse
Thanks for replying
Regarding your questions, no i didnt make no efs backup, wifi and cellular functions do not work on custom roms either and i own a I9300
Akbar.Ahad said:
Thanks for replying
Regarding your questions, no i didnt make no efs backup, wifi and cellular functions do not work on custom roms either and i own a I9300
Click to expand...
Click to collapse
What rom version did you start out with and what rom version did you flash?
Darke5tShad0w said:
What rom version did you start out with and what rom version did you flash?
Click to expand...
Click to collapse
I started with liquidsmooth on 4.4.4 , which worked flawless, and changed to stock 4.1.3
Akbar.Ahad said:
I started with liquidsmooth on 4.4.4 , which worked flawless, and changed to stock 4.1.3
Click to expand...
Click to collapse
You cannot go backwards to 4.1 with out a efs v1 back up. Somewhere in 4.3 samsung updated it to v2.
Without a back up you can only use the latest 4.3 and upwards.
http://forum.xda-developers.com/galaxy-s3/general/ref-imei-efs-stuff-i9300-including-t2393289
Darke5tShad0w said:
You cannot go backwards to 4.1 with out a efs v1 back up. Somewhere in 4.3 samsung updated it to v2.
Without a back up you can only use the latest 4.3 and upwards.
http://forum.xda-developers.com/galaxy-s3/general/ref-imei-efs-stuff-i9300-including-t2393289
Click to expand...
Click to collapse
Actually im not sure what I flashed to but im pretty sure it is 4.3 as I just done a basic flash using odin, no backup was needed. Could i get somebody elses efs file backup and restore it?
Akbar.Ahad said:
Actually im not sure what I flashed to but im pretty sure it is 4.3 as I just done a basic flash using odin, no backup was needed. Could i get somebody elses efs file backup and restore it?
Click to expand...
Click to collapse
Going to settings, about phone will tell you the version
No you cannot do that. Read up on that link I sent you.
Hi there, im on 4.3 stock rom. The thread you provided me with says to flash stock rom with odin. The problem is I do not know which stock rom I should flash. Please tell me which one I should flash and if you can provide me with a link.
My s3 model is gt-i9300, uk model and is unlocked.
Sent from my GT-I9300 using XDA Free mobile app
Darke5tShad0w said:
Going to settings, about phone will tell you the version
No you cannot do that. Read up on that link I sent you.
Click to expand...
Click to collapse
Hi there, im on 4.3 stock rom. The thread you provided me with says to flash stock rom with odin. The problem is I do not know which stock rom I should flash. Please tell me which one I should flash and if you can provide me with a link.
My s3 model is gt-i9300, uk model and is unlocked.

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