If you have a Samsung Galaxy S3 there is a good chance you want Android 4.2 Jelly Bean on it without having to wait on your carrier. This will explain how you can install Android 4.2 on your Galaxy S3 easily without waiting. Thank you to all of the developers at CyanogenMod that have made this possible.
NOTE: You must have your Samsung Galaxy S3 rooted with an unlocked bootloader in order to complete the process below. You will have to Google the instructions to Root your version of the Samsung Galaxy S3 as well as unlocking the Galaxy S3 Bootloader. It seems there is no universal method currently that we can find.
Before you begin be sure to download the appropriate version of Android 4.2 and GAPPS and place them on either your internal storage or SD card (we recommend using the SD card).
- Carrier – Verizon – T-Mobile – AT&T/Cricket – Sprint – International/I9300 – US Cellular – Metro PCS
- GAPPS (Google Apps like Google Play and Talk) – Download
Process to Install Android 4.2 Jelly Bean on the Samsung Galaxy S3:
- Go to Google Play and install “Rom Manager” its a free app
- Open Rom Manager and use it to Boot into recovery via “Reboot Recovery”
- Backup your current ROM by navigating via volume buttons and selecting “backup” with your power button.
- Clear Data by navigating to “Wipe Data/Factory Reset”.
- Next Wipe Cache by navigating to “Wipe Cache partition”
- You are now ready to install the new ROM you Downloaded by navigating to “Install Zip from Internal” and selecting the CyanogenMod 10.1 file.
- Last you need to install GAPPS the exact same way as you did the ROM in the last step.
- Reboot your device and you now have Android 4.2 Jelly Bean on you Galaxy S3.
We have tested this on an AT&T Galaxy S3 although the others have been verified by the community. If you have any issues throughout this tutorial please let us know via comments below. You may also go to CyanogenMod for more information via the source link below.
Source: CyanogenMod