Download Android 4.1 Jelly Bean for Galaxy S3 I9300

The Android 4.1 Jelly Bean update for the Samsung Galaxy S3 GT-I9300 has been rolled out to different regions of the world, however, not all have been blessed with the Jelly Bean goodies yet. Users in some countries are still waiting for the official updates to arrive. Android 4.0 Ice Cream Sandwich is performing well on the phone, but the phone can perform better if updated to Android 4.1 Jelly Bean.
Since no exact date has been given to when the update will arrive, some users resort to flashing custom ROMs on their
phones. CyanogenMod 10 is a popular custom ROM that allows you to enjoy Android 4.1 Jelly Bean on your phone.
XDA Developers member XpLoDWilD shares the official nightly builds of the CyanogenMod 10 ROM for the Samsung Galaxy S3 GT-I9300. Flashing this ROM will allow you to enjoy pure yet enhanced Android 4.1 Jelly Bean on your mobile phone. Since this is a nightly build, there are still a few issues in the ROM, such as the following:

• Laggy animations on the user interface
• Camera recording effects not working
• Issues with touch-to-focus on camera with LED flash enabled
• Auto streaming via Bluetooth becomes laggy or stops at a certain distance
• FM radio not supported

This guide shows you how to upgrade the Galaxy S3 I9300 to Android 4.1 Jelly Bean via CyanogenMod 10 (official nightly).

Warning

• The instructions in this guide are intended for use with the Samsung Galaxy S3, model number GT-I9300. Applying these instructions on another device or model may produce undesired outcomes.
• The information in this guide is provided for instructional and educational purposes only. There is no guarantee that these instructions will work under your specific and unique circumstances.
• Use these instructions at your own risk. We shall not hold any responsibility or liability for whatever happens to you or your device arising from your use of the info in this guide.
• Read and understand the whole guide first before actually performing the instructions.

Requirements

• Samsung Galaxy S3 GT-I9300 running stock Samsung Android 4.0 Ice Cream Sandwich ROM and with ClockworkMod Recovery installed
• Download the following files:
  • latest nightly build of CyanogenMod 10 for the I9300
  • GApps (Google Apps) package (gapps-jb-20121011-signed.zip, md5sum: 4e9e7ec3c22b0b3471bd05d62b8a659d)
• Backup all personal data on your phone to make sure you have a copy of your personal data (e.g., contacts, SMS, MMS, Internet settings, Wi-Fi passwords, and the like) in case the procedure in this guide erases such data.

Instructions

1. Copy the CyanogenMod 10 nightly ROM and GApps package to your phone’s
   internal SD card.
2. Switch off your phone.
3. Reboot your phone to ClockworkMod Recovery. You can do that by pressing and holding the Volume Up, Home, and Power buttons until recovery boots.
4. Create a NANDroid backup of your current ROM. Go to Backup and Restore and select Backup on the next screen.
5. Select Install ZIP from SD card.
6. Select Choose ZIP from SD card and locate the CyanogenMod 10 ROM ZIP file. Confirm the action on the next screen to flash the ROM to your phone.
7. In a similar way, flash the GApps package as in steps 5 and 6.
8. Go back to the main menu and select Wipe data/factory reset and confirm the action on the next screen.
9. Select Reboot system now to restart your phone.

Congratulations! You have successfully updated your Samsung Galaxy S3 GT-I9300 to Android 4.1 Jelly Bean via the official nightly build of CyanogenMod 10 ROM.