Want to install 4.2.2 Jelly Bean Custom ROM on Nexus S 4G, then first you should root Nexus S 4G. The last official update released by Google/Samsung for Nexus S 4G was Android 4.1.1 Jelly Bean, which is pretty outdated and you have updated too. So, if your Nexus S 4G runs on JRN84D Android 4.1 Jelly Bean and you want to root your device then follow the below procedure carefully!
The post covers the complete guide on rooting. Before going through the whole process, you must read the requirements and a disclaimer. Note: Root Nexus S 4G voids your device warranty.
Requirements to Root:
1. Charge your battery up to 70%.
2. Enable USB debugging. (All apps > Settings > Manage Applications > Development > USB Debugging – check box)
3. Backup your phone data.
4. CWM Recovery must be installed.
5. Install Samsung Nexus S 4G USB drivers from here.
6. Download file.
Step 1: Copy the SuperUser file in to external/internal storage of your device.
Step 2: Now, boot your Nexus S 4G in fastboot mode by pressing “Volume Up + Volume Down and Power buttons” and choose RECOVERY to enter into Recovery Mode.
Step 3: In CWM Recovery Mode, select “flash zip from SD card” > “Choose a zip from SD” card and navigate to SuperUser file and give OK.
Step 4: Once completed, go to the main menu and select “reboot system now” and wait for 2-3 minutes to start services and apps.
Congratulations! You have successfully rooted Nexus S 4G running on JRN84D Android 4.1 Jelly Bean. In case, if you face any difficulty then feel free to contact us via comments and we will try to solve your all the difficulties. Don’t forget to leave your feedback. Do share with your friends and hit “g +1“, if you find this guide useful!