Upgrade Sony Xperia J to Android 4.1.2 Jelly Bean

Posted on 13 March 2013

Previously we’ve already posted how to upgrade Sony Xperia TL to Android 4.1.2 Jelly Bean through PC Companion and manually upgrade using Flash Tool and Generic ROM of Xperia TL. And now, we would like to share how to upgrade Sony Xperia J to Android 4.1.2 Jelly Bean where it comes unexpectedly from Sony. However, this update to Android 4.1.2 JB for Xperia J is not available in all countries, it just arrived in selected countries but you still can update your phone manually to get the same experience by following the step-by-step tutorial given below.

Sony Xperia J has only dual-core 1 GHz and 512MB of RAM but Sony works to his phone to provide an update to Android 4.1.2 Jelly Bean even though the company did not announce the release of this update officially. To update your Xperia J to Android 4.1.2 Jelly Bean, the easy way is using PC Companion or Sony Update Service (SUS) but for those users who are not able to get this update, you can still install the update manually than enjoting the newest of Jelly Bean features in Sony Xperia J.
SOny Xperia J update to Android 4.1.2 Jelly Bean
The official firmware is unbranded international version, that’s mean you can apply the firmware to any Sony Xperia J devices. But do not try this firmware for any other phone. To flash your Xperia J as the upgrade process is not scary, just follow the tutorial given below but before you proceed to next step ensure you take following precautions.

- Installing this official ROM on your phone will wipe all the data. Backup your data.
- Ensure your battery is around about 60-70% charged.
- This tutorial is only meant for installing Android 4.1.2 official ROM on Sony Xperia J.
- You will lose root as soon as you install this update. You need to root again your phone to gain full system access and be able to install root apps again.

Download Sony Xperia TL Latest USB Drivers

Before you can upgrade Xperia J to Android 4.1.2 Jelly Bean. You must ensure you’ve already install the Windows USB drivers to connect your phone to PC. You can download the latest official drivers for Xperia J from Sony’s website or check one of our compilation lists here to find the direct link to download Sony Xperia J latest USB drivers.

How to Install Android 4.1.2 official ROM on Sony Xperia J

Just to ensure everything will smoothly during install Android 4.1.2 official ROM on Sony Xperia J. We would like to remind few things above as precautions.

Okay, now you can follow step-by-step tutorial on how to install Android 4.1.2 official ROM on Sony Xperia J below. Please follow thoroughly all steps to ensure the installation success.

Step 1 – Download Flash Tool from download link than install it in your PC.
Step 2 – Download Generic ROM for AT&T Sony Xperia J from download link.
Step 3 – Put the downloaded files that have format of .ftf to C:\ Flashtool\Firmwares or Firmware folder of flashtool wherever you have installed in your PC.
Step 4 – Now launch Flashtool on your PC.
Step 5 – On the main interference on Flashtool click Thunder sign on Top left corner.
Step 6 – Select Flashmode from the Next window which appears.
Step 7 – Wait for Flashtool to Load Necessary files.
Step 8 – An instruction window will appear asking you to connect your phone to PC. Now turnoff your Phone and wait 30 secs, Now Press Volume Down Button on your Phone and while Holding the volume download Button Insert USB cable into your Phone and keep volume down key Hold for few more seconds.

Now, the flashing will begin automatically. Please sit back and relax till message appears that flashing has been finished. Once the flashing success, disconnect your phone and restart it.
Well done!. Your Sony Xperia J just been updated to Android 4.1.2 Jelly Bean. Enjoy the phone, feel the different experience compare to previous Android ICS.