Loving to install CyanogenMod 10.1 Android Jellybean 4.2.2 based custom ROM Firmware on Samsung galaxy S3 model numbered I9300, Here is the step by installation guide and download link for unofficial CyanogenMod 10.1 Android 4.2.2 Jellybean ROM. Formerly official Android 4.2.2 jellybean updates from google received some of nexus devices like Nexus 7, 10 and Galaxy Nexus I9250 and this article brings unofficial CyanogenMod 10.1 Android 4.2.2 Jellybean ROM to your Samsung galaxy S3 international version( GT-I9300). CyanogenMod is based on the Android Open Source Project with extra contributions from many people within the Android community.Samsung Galaxy S3 I9300 Android 4.2.2 Jelly Bean CM10.1 Custom ROM

From this update all apps updated to 4.2.2 version and applications also updated to Google Play Store 3.10.14, Google Play Services 3.0.25 and importantly Gmail2.apk and GoogleEars.apk (Sound Search for Google Play) removed but I9300 device can get Gmail and Sound Search after flashing by re-installing from google play store. Keep backup previous version’s Photosphere/Picasa sync install on Mako, Manta, and Tuna.

Before installing Custom ROM on your SGS3 I9300 take an action to be safe

Backup your mobile complete data ex Images, Contact and settings. It proves as intelligent step in case, the update process does not go right or any data damage we you can easily restore.

Simple back up guide Use “SMS Backup & Restore app” for SMS, Sync with the Gmail application for contact, Images, Songs, Videos, Files – Copy to internal / External SD Card, Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”- 3G or 3G network APN and MMS Settings.

Enable USB debugging option by checking this path link “Settings > Applications > Development > USB debugging”.

Keep minimum of 60% battery back up to install successful firmware without any interruption (switch off)

Before start your CyanogenMod 10.1 Android 4.2.1 Jellybean Custom ROM firmware install on Samsung galaxy S3 i9300 read carefully Disclaimer and Warning from our team.


  1. cm-10.1-20130215-UNOFFICIAL-i9300-V55.zip (167.5MB)- Link
  2. Google Apps-gapps-jb-20130301-signed.zip (90.90MB) – Go to this link and Cyanogen Mod 10.1.x and android version 4.2.2 and download G Apps.

Install Unofficial CyanogenMod 10.1 Android 4.2.2 JB to Samsung Galaxy S3 I9300

Download both the CM10.1 official files device coded i9300 (CM-10.1-20130215-UNOFFICIAL-i9300-V55) and Google Apps to your local hard disk on PC or laptop from above mentioned download links.

Connect your Galaxy S3 to PC via USB cable or Wi-Fi and transfer or copy both downloaded files GApps and CM10.1 ZIPs to your MicroSD Card.

Note: Make sure your mobile running a proper working ClockworkMod-Recovery

Turn off galaxy S3 and Boot into Recovery (CWM Recovery) by following this simple step hold Volume UP + Home + Power button jointly for a moment

Use Volume Up or Down button for Recovery Menu navigation

Go to choose from SDcard or install ZIP from SD card and Flash CM10.1 zip from SdCard and GApps zip from SDCard

After both files got flashed DO A DATA WIPE / FACTORY RESET (otherwise your device will be stuck at boot)

Note:  you are advised to don’t restore system data using Titanium Backup because Restoring Apps + Data might cause problems so that not recommended, avoid it if possible!

That’s it Reboot your Galaxy S3 device and enjoy CyanogenMod 10.1 Android 4.2.1 Jellybean features.

Check your Android version (4.2.2) and Kernel version (3.0.31-CM-00114-gc715892) also a CyanogenMod version (10.1-20130215-Unofficial-i9300-Codeworkx) at About device section

Disclaimer and Warning

The above unofficial Flashing and Custom ROM installation may lead to your device’s hardware and software damage and your device lose warranty info, but you can easily get back this by Flashing default Stock ROM. So follow the process at your own risk.