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Install Android 4.1.2 JZO54K firmware for Nexus S


Yesterday we brought the Android 4.1.2 factory images for the Nexus S and now the Android 4.1.2 JZO54K firmware for the Nexus S is also available, a senior XDA developer member fireb33 build this firmware ROM with factory images even he adds some extra features to it that will give you a better experience than the stock, it’s pre-rooted custom ROM.

Read on how on to install Android 4.1.2 Jelly Bean JZO54K firmware build ROM on Nexus S, it’s important to note that the ClockworkMod recovery must be installed on your Nexus S, and be sure to make a backup of your device data such as SMS, internet setting, contacts music files etc because the below procedure may wipe data, you can sync your contacts with Gmail account and for messages use SMS apps, lastly use file expert app to backup apps.

DISCLAIMER: Please proceed the below guide at your own risk, Android Egis will not be held responsible if your device lost data or gets damaged following this guide.

Instructions

Step #1: Download the Android 4.1.2 JZO54K firmware ROM (NS_JZO54K.zip) and Google Apps package from here.

Step #2: Transfer both .zip files to your Nexus S.

Step #3: Turn the device off.

Step #4: Reboot the device into recovery mode, to do so reboot phone by holding down the volume down and power buttons, then use volume keys to navigate and power button to select, you need to select the recovery option to enter in recovery mode.

Step #5: In recovery mode, create a nandroid backup of your current ROM, it’s important because if anything not work out that you expect from this ROM, you’ll be able to easily revert back to your current state. To create backup select “Backup and Restore”, and then select “Backup” again.

Step #6: Perform full wipe, first select the wipe data/factory reset, and confirm on the next screen.

Step #7: Return to main menu by selecting “Go Back”.

Step #8: Select “Install Zip from SD Card” then “Choose Zip from SD Card” and locate the downloaded ROM .zip file that you’ve transferred in above step and confirm installation, once it done, also install the Google Apps package in the same manner.

Step #9: Once the installation is completed, select “Go Back” after that select “Reboot System Now” to reboot your phone.

That’s it, enjoy the newer firmware – Android 4.1.2, if you faced any issue, do comment below!

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