[ROM] Install Android 4.2.1 on Samsung Galaxy S3 I9300 ROM through CM10.1

The smartphone Galaxy S3 just received the official update Android 4.1 .2 past few days, however, users of this phone can fully upgrade to the latest version of android 4.2 .1 through ROM version CM10.1 of CyanogenMod .

There are still plenty of bugs and features not working correctly but the ROM version is great choice for you to enjoy the experience the unique new features in this latest operating system.

The feature does not work (will be revised down in the next update)

- UI: Apps like NHK are broken

- Camera: Recording effects broken

- Camera: 2 Touch focus flashlight issues with enabled

-          Bluetooth : does not pair

- Bluetooth audio streaming Becomes sometimes laggy or stops at a distance> 1m

- FM Radio: unsupported

- TV Out: unsupported, will never work (proprietary, undocumented)

- Lots of missing and yet unimplemented features

If you want to install this ROM version for its Galaxy S3 follow the instructions below:

Note:

- Instructions below exclusively for Samsung Galaxy S3 GT-I9300, the application for other devices can lead to unwanted results.

- Guide for reference only general, we do not guarantee guide will work correctly in the circumstances.

- Up ROM is direct intervention into the system will exist a certain risk to your device, we do not assume any responsibility for the risks that may occur on the device.

- Reading all previous guidance progress.

Requirements:

-          Samsung Galaxy S3 GT-I9300 is Root and ClockworkMod Recovery installed.

- Backup all important data and applications, communications, SMS, MMS, callog, notes ....

- Please charge the phone battery to at least 60%

- Download the following files on your computer:

• CM10.1 unofficial  (12/11/2012)
• Google Apps

Installation for Galaxy S3 I9300 CM10.1:

1. 2 Copy the downloaded file on the SD card of your phone.

2. Turn off the phone, disconnect the computer.

3. Boot your phone into Recovery mode by pressing, simultaneously hold the Volume Up key + Home + Power.

4. In CWM Recovery to create a Nandroid backup of your current ROM version: Backup and Restore> Backup.

5. Delete old data ROM version:

Wipe data / Factory reset> confirm

Wipe cache partition> confirm

Advanced> Wipe Dalvik Cache> confirm

6. At the main menu select Install ZIP from SD card> Choose ZIP from SD card> choose the ROM file to the memory card copied in step 1 and select Yes to proceed with the installation.

7. Repeat step 6 but with GAPP file to install Google apps.

8. The process is complete return to the main menu select "Reboot System Now to reboot the phone. First boot may take longer than usual for about 5 minutes.

Note : ROM Version encountered some error recovery applications using Titanium backup. Avoid using Titanium backup when not needed.