Install Official CM 10.2 Android 4.3 Jelly Bean on Galaxy S3 – How To Guide.

The Official CM 10.2 is now available for Samsung Galaxy S3 I9300, so if you want to try CyanogenMod on your device and also want speed and performance, this is the best ROM for you. CM 10.2 is based on Android 4.3 AOSP JB and have tons of Features of CyanogenMod. This is a Custom ROM,not an official one, so back-up all your data before proceeding. To install CM 10.2 on your Galaxy S3, follow the whole Article. Read the Important things before proceeding.

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In this Article,  we will show you How To Install Official CM 10.2 Android 4.3 Jelly Bean on Galaxy S3. But before we begin, Make sure that you have battery charged over 60 % and have backed up all your important ContactsCall Logs & Messages.It is highly recommended in case of any mishap or data loss to back up all your important data.

Disclaimer:

The methods involved in flashing custom roms and rooting your phone is highly custom and may result in bricking your device,and has nothing to do with Google or the device manufacturers which is Samsung in our case. In case of any mishap we may not be held responsible. Follow these instructions to the letter to avoid any mishap or bricking. Make sure that whatever you do, you are doing it at your own responsibility.

Important things:

  • Your Device must be Rooted and Latest TWRP or CWM Recovery must be installed on it.
  • Make Sure that USB Cable is not Connected With PC While The Installation in Process.
  • Enable USB debugging mode.
  • Make sure that battery level is at 85% or more.
  • This Tutorial is Only For Samsung Galaxy S3 I9300.
  • Back-Up your Mobiles EFS DataHow To Restore and Back-Up EFS Data On Samsung Galaxy Devices.

How To Install Official CM 10.2 Android 4.3 Jelly Bean on Galaxy S3.

CWM Recovery Users.

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  • Turn off your phone and open Recovery mode. How? Press and hold Volume Up +Home + Power buttons until you see some text on screen.
  • First Choose ‘Wipe Cache’.
  • Then Navigate to ‘advance’ and choose ‘Devlik Wipe Cache’ so you won’t get in any bootloop.
  • Then finally select ‘Wipe Data/Factory Reset’.
  • Navigate to ‘Install zip from sd card’ another windows will open in front of you.
  • Select ‘choose zip from sd card’ from the Options.
  • Select the Android 4.4 file and confirm the installation on next screen.
  • Wait for the process to over, now Choose Google Apps instead of Android 4.4, to install Google Apps.
  • Navigate to ‘++++++++Go Back‘ to return to previous screen.
  • Then select “reboot system now’ to reboot your device.

TWRP Users.

TWRP-2.3.3.0

  • Tap on Wipe Button and Select System, Data and Cache.
  • Swipe the Confirmation Slider.
  • Go back to Main Menu and Tap Install Button.
  • Locate the Android 4.4 and Google Apps, Swipe the Slider To install it.
  • Finally Tap Reboot and then System.

Voila! your Samsung Galaxy S3 I9300 has been updated to Android 4.4 Kit-Kat CyanogenMod Custom Firmware , Wait for at least 5-minutes for the first run.


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