Recently Samsung released Android 4.1.2 XXEMH4 for Galaxy S3 International version (GT-I9300). The update is available through OTA and Kies for the users of India, Sri Lanka, Bangladesh and Nepal. May be this is the final version of Android 4.1.2 for the following countries before the upcoming Android 4.3 update .The update include some battery and performance tweaks.

In this I included the steps to manually flash Android 4.1.2 Jelly bean XXEMH4 to Galaxy S3 I9300 International version using Odin.

Firmware Details
PDA: I9300XXEMH4
CSC: I9300ODDEMI2
MODEM: I9300DDEMG2

Note :
1. Backup your important data.
2. Enable USB debugging in your phone.
3. Battery must have 60% or more charge.
4. Disable or Exit Antivirus and Kies if you are installed.
5. Your PC must install Kies or Galaxy S3 driver.
6. This Firmware is only for Galaxy S3 I9300 International Version.

How To Flash Official Android 4.1.2 I9300XXEMH4 in Galaxy S3 I9300 using Odin ?

1. Download Official Android Jelly Bean 4.1.2 I9300XXEMH4 for your country from below links.
  India | Sri Lanka | Bangladesh | Nepal
2. Extract the downloaded firmware zip.
3. Download Odin v1.85 - Download
4. Now, Extract and Open odin3 v1.85.exe.
5. Power off your phone.
6. Now boot in to download mode. ( Press and hold : Volume down key and Home button ( Center button ) ,now press and hold the power button to boot in to download mode and Press Volume up on Warning)
7. In download mode connect your phone to PC.
8. Now look in to Odin... ID:COM box, it will be yellow with a port name and Added! message will be displayed.
( If not it will the problem of driver or USB ... check both )



9. In Odin..Click PDA and browse the extracted firmware folder and select I9300XXEMH4_I9300ODDEMI2_I9300DDEMG2_HOME.tar.md5 finally Click Start button.



10. After complete update Odin will show PASS on top left and phone will reboot. now unplug phone from USB.



Thats it .... Done .

Note :
If the phone stuck at the boot screen...
1. Remove and reinsert your battery.
2. Now boot into recovery mode. (Volume up + Home + Power )
3. Apply wipe data/factory reset.
4. Apply wipe cache partition.
5. Finally reboot system...

Done !

Go to the below post to root the firmware

How To Root Samsung Galaxy S3 Jelly Bean 4.1.2 XXEMH4 ?

As a continuation of the post How To Manually Update Samsung Galaxy S2 to Stock Jelly Bean 4.1.2 I9100XXLSJ ?, in this post i am writing about the method to root Samsung Galaxy S2 Jelly Bean 4.1.2 XXLSJ. This method of rooting is more secure and simple. You dont need to install any insecure kernel and you dont need to use any third party tools, Just install the provided zip package from stock recovery.

We should thank to XDA senior member PhilZ for the zip package with a short time. The package contains root files , CWM6 and SuperSu.

Warning : Rooting will void phones Warrenty ! Rooting / Flashing may brick your phone ! We are not responsible for any damage do at your risk !

Note:
1. Backup Importent Data
2. Battery charge must be 60% or more

Root Galaxy S2 Jelly Bean 4.1.2 XXLSJ using zip package

1. Download 4.1.2 XXLSJ Root zip package from here (v3.75)
2. Copy the downloaded zip package XXLSJ-ROOT-CWM6.zip to external SD card.
3. Switch off your phone and wait till vibrate.
4. Boot in to stock recovery ( Volume up + Home + Power )
5. In recovery select apply update from external storage.



6. Select copied zip file XXLSJ-ROOT-CWM6.zip


7. After installation ....select reboot system now...

Thats it...Now you are successfully rooted Galaxy S2 4.1.2 XXLSJ.

Samsung started rolling out Android 4.1.2 to Galaxy S2 International variant (I9100). So far this is the major update to Galaxy S2 by Samsung. Through Kies or OTA this Official update is available only for some selected countries.

If your phone not showing any update dont worry , Samsung will provide the update very soon to Your country or you can manually install the update by following the simple steps here.

Some great features in the new Jelly Bean Update:
- Buttery Smooth Performance & Great Stability
- Full User Interface Revamp (Same UI as of the Galaxy S III and Galaxy Note II)
- TouchWiz Nature UX
- S Cloud services by Samsung
- Improved Camera features
- New Lockscreen With Many Customization Options
- New Features like Direct Call, Smart Stay and Pop-up Play
- New Widgets (From Galaxy S III)
- 2 Home screen modes
- New Notification bar With More Notification Toggles
- Google Now

Firmware Details:
Android Version: 4.1.2 – Build JZO54K
PDA: I9100XWLS8
CSC: I9100FOPLS3
MODEM: I9100XXLS8
Changelist: 816988
Build Date: 14 January 2013

Must Note :
1. This update only for Samsung Galaxy S2 International variant I9100
2. Make sure that your phone is factory unlocked not locked for specific carrier
3. Backup All the Data in your Phone
4. Your Phone Charge Must Be 80% or above
5. Enable USB Debugging
6. Make sure you have installed Kies or S2 driver
7. Exit Antivirus, Kies etc .. before start flashing.

How To manually update Galaxy S2 I9100 to Official Android Jelly Bean 4.1.2 XWLS8?

1. Search Samfirm to download the Specific 4.1.2 to your country Or Download Galaxy S2 4.1.2 XWLS8 (Spain) firmware and Extract it to PC
2. Download Odin3 v1.85 and Extract it
3. Power off and boot Galaxy S2 in to download mode. ( Volume down + Home + Power )
4. In download mode connect your phone to PC.
5. Now Open Odin 1.85 and look in to ID:COM box it will be yellow with a port name and a "Added!" message will be displayed in Message box.
6. In Odin..Click PDA and select I9100XWLS8_I9100XXLS8_I9100FOPLS3_HOME.tar.md5 from Extracted firmwares folder.

7. Click Start button. Odin will show PASS on top left and phone will reboot.

Thats it done ....You are succefully flashed your Galaxy S2 to Official Android Jellybean 4.1.2.
If you face boot loop after flashing ...go to recovery mode and do a factory reset and wipe cache....done...

ROOT FOR GALAXY S2 4.1.2 XWLS8 IS AVAILABLE HERE

As a continuation of the previous post, here I am including the method to root Galaxy S3 I9300 Jelly Bean 4.1.2 XXEMH4. The method is based on the Galaxy S3 CF Auto Root method which was posted before.

So far this is the fastest and simplest method of rooting Galaxy S3 I9300 Jelly Bean 4.1.2 XXEMH4. The Root is developed by XDA Elite Recognized Developer Chainfire. This post is specific for Galaxy S3 I9300. If you have other Galaxy S3 variants follow the post here

Requires:
- A windows computer with Galaxy s3 driver installed ( Use Kies ).
- Odin
- Any of the Galaxy S3 model listed in the Supporting Models with more than 50% battery.
- USB Cable

Note:
- Backup all your important data.
- Kill all the Kies processes using Windows Task Manager.
- Disable Antivirus.
- This Root is Only for Galaxy S3 I9300 International version

Disclaimer:
Rooting or installing recovery may brick your phone or void warranty. I am not responsible for anything. Do at your risk.

How To Root Galaxy S3 Jelly Bean 4.1.2 XXEMH4 ?

1. Download and extract CF-Auto-Root-m0-m0xx-gti9300.zip from here ( Odin Included )

2. In the extracted folder open Odin3-v1.85.exe.

3. Click PDA button and select CF-Auto-Root-m0-m0xx-gti9300.tar.md5.

4. Boot your phone to download mode ( Turn off phone, after all the lights gone press volume Down + Home + Power .If it asks to press a button to continue, press the listed button ).

5. Now, Connect the phone to PC using USB cable.

6. If everything correct Odins ID:COM box it will be in yellow or blue color with a port name.

7. Make sure Re-partition is NOT checked.



8. Finally Click Start button and wait till the phone reboot.

After complete update Odin will show PASS on top left and phone will reboot.



Thats it....You are successfully Rooted your phone....

How To Install TWRP Custom Recovery in Galaxy S3

If you are on Android 4.2 and you cant find Developer options or USB debugging , dont worry it is not your firmware issue. In Android 4.2 Jelly bean update Google has hided Developer options menu , by default it is not visible in the Settings menu.

Yo can simply enable this Developer options by following the below method.

How To Enable USB Debugging in Android 4.2 Jelly Bean ?

1. Go to Settings-> About phone.
2. Now tap on the Build number option repeatedly about 7 times.
Now you will get a Toast message you are now a developer.

Thats it ... Now go back to Settings you will see the Developer options placed in the menu and you can enable USB debugging.

Yesterday i was posted How To Flash Official Android Jelly Bean 4.1.2 XWLS8 on Galaxy S2 I9100 ? as a continuation of that post ,today i am writing the method to root the Galaxy S2 Official Jelly Bean 4.1.2 XWLS8 update. Like the previous root methods i was posted here .. this method also simple and secure as it is not using any root tools or insecure kernel.

The method is simple .. just install the provided zip package from stock recovery. The zip package is created by XDA senior member PhilZ.(thanks for making this).Please check the firmware details..... if your phone have the same firmware below then you can install this zip in your phone..otherwise dont try it.

Firmware Details:
Android Version: 4.1.2 – Build JZO54K
PDA: I9100XWLS8
CSC: I9100FOPLS3
MODEM: I9100XXLS8

Must Note:
- This root package is only for International Galaxy S2 I9100 Android 4.1.2 XWLS8.
- Backup Impotent Data.
- Battery Charge Must be 60% or above.

* Rooting may void warranty or it may brick your phone ..we are not responsible for anything ..do at your risk.

Root Galaxy S2 Official Jelly Bean 4.1.2 XWLS8

1. Download 4.1.2 XWLS8 Root zip package from here (v4.0 B22)
2. Copy the downloaded zip package XWLS8-ROOT-CWM6.zip to external SD card.
3. Switch off your phone and wait till vibrate.
4. Boot in to stock recovery ( Volume up + Home + Power )
5. In recovery select apply update from external storage.



6. Select copied zip file XWLS8-ROOT-CWM6.zip



Thats it...Now you are successfully rooted Galaxy S2 I9100 Jelly Bean 4.1.2 XWLS8.

Yes Stock Jelly Bean 4.1.2 is available for Samsung Galaxy S2. It is an unofficial first leak of GS2 Jelly Bean leaked by XDA member izap and shared by SamMobile. Even a leaked unofficial one it is really stable. This leak included most of the Jelly Bean features included in official release.

Some Notable Features included in Galaxy S2 4.1.2 I9100XXLSJ update:
- Project Butter
- TouchWiz Nature UX (Same UI as of the Galaxy S III and Galaxy Note II)
- Samsung’s Cloud services
- Direct Call, Smart Stay and Pop-up Play Features
- New Widgets From the Galaxy S III
- 2 Home screen modes
- New Notifications bar
- Google Now

Firmware Details:
Android Version: 4.1.2 – JZO54K (Jelly Bean)
PDA: I9100XXLSJ
CSC: I9100OXXLS1
MODEM: I9100XXLS6

Note :
1. Backup your important data.
2. Enable USB debugging in your phone.
3. Battery must have 60% or more charge.
4. Disable or Exit Antivirus and Kies if you are installed.
5. Your PC must install Kies or Galaxy S2 driver.
6. This ROM is only for Galaxy S2 I9100 international version.

* We are not responsible for any damage ...do at your risk.

Note:

This is Old Leaked Firmware... Latest Official Android 4.1.2 is available ... Click Here for the Latest one...

How Flash Jelly Bean 4.1.2 I9100XXLSJ on Galaxy S2 using Odin3 v1.85

1. Download Firmwares from here
2. Download Odin3 v1.85 from here
3. Extract the update file I9100XXLSJ_I9100OXXLS1_OXX.zip( You will get 6 files )
- CHECKSUM.md5
- CODE_I9100XXLSJ.tar
- CSC_HOME_OXX_I9100OXXLS1.tar
- emmc_EXT4_16GB.pit
- emmc_EXT4_32GB.pit
- MODEM_I9100XXLS6.tar
4. Now, Extract and Open odin3 v1.85.exe.
5. Power off Galaxy S2.
6. Now boot in to download mode. ( Volume down + Home button + power button )
7. In download mode connect your phone to PC.
8. Now look in Odin... ID:COM box will be yellow with a port name and Added! message will be displayed.
9. In Odin..Click PDA ,PHONE, CSE and select corresponding files
- PDA - CODE_I9100XXLSJ.tar
- PHONE - MODEM_I9100XXLS6.tar
- CSC - CSC_HOME_OXX_I9100OXXLS1.tar



10. Click Start button.
11. After complete update Odin will show PASS on top left and phone will reboot. now unplug phone from USB.



Thats it Done ! You are successfully updated Galaxy S2 to Jelly Bean 4.1.2

Root Galaxy S2 Jelly Bean 4.1.2 XXLSJ Here