Nexus S smartphone has been denied any further Jelly Bean updates after Android 4.1.2 release, as Google has ruled out any possibility of supporting further OS upgrades on the device. Nevertheless, the industrious Android custom ROM developers have once again stepped up to the rescue with the release of latest Android 4.2 Jelly Bean upgrade for the smartphone. The latest Jelly Bean firmware brings a host of exciting apps with stock Jelly Bean features onboard that were earlier ported to Nexus 7, Nexus 10 and Nexus 4 range of devices.

Key Points to Note

  • Ensure that your phone is rooted with ClockworkMod Recovery preinstalled on it. To confirm if your device is rooted or not, download and run the Root Checker app from Google Play Store. Once you have verified the device is rooted, just download and install the ROM Manager app from the Play Store.
  • As this is a custom ROM release, it may harbour a few untested bugs or broken features. It must be regarded as a preview version only, as the bugs will be addressed in the upcoming updates.
  •  IBTimes UK advises users to backup apps, important personal data and settings to avoid risk of data loss while flashing the Android 4.2 Jelly Bean update on your Nexus S phone. Users are advised to avoid using ROM Manager for data backup, as it may brick the device.
  • Verify that your phone battery is at least 85 percent charged to prevent unexpected device shutdown (due to battery drain) while flashing the Android 4.2 JOP40C firmware update unofficially.
  •  Enable USB debugging mode by navigating to Settings > Applications > Development and check the USB debugging option. Also ensure that your computer's USB ports have full read/write access.
  • The instructions provided in this guide are meant for reference purpose only and do not cover any warranty claims involving device damage or issues arising out of using the JOP40C firmware update. Users are advised to proceed at their own risk.

How to Update Android 4.2 Jelly Bean on Nexus S Unofficially

Nexus S Gets Android 4.2 Jelly Bean Firmware Unofficially [How to Install]
Photo: XDA Developers
  • Download the Android 4.2 Jelly Bean Firmware Package from here to your computer. After the ROM file is downloaded, connect your Nexus S to the computer with the USB cable. Then, copy the ROM file to the phone's root folder on the SD card and finally disconnect the device from the computer.
  •  Launch the ROM Manager app that you downloaded from Play Store, and select Flash ClockworkMod Recovery Image option for flashing the CWM image to the device. It will download the image from Wi Fi or mobile internet, so that you have active internet connection.
  • Now, after the CWM image is flashed successfully, you will be notified about the same and then choose Reboot into Recovery Mode.
  • In recovery mode, choose Wipe data/factory reset and Wipe Cache partition. If the device boots into normal mode, then you need to retry the process of booting the device into Recovery Mode.
  • Now, choose install zip from sd card and select the copied Android 4.2 Jellybean Firmware package in your device. After the ROM file is selected, it will take about 2 to 3 minutes for applying rhe update.
  • Now, once the firmware is updated, click Go back and tap Reboot System Now. Go to Settings > About Phone to verify the firmware version installed.

Note: In case if the device fails to boot or display the home screen then remove the battery and reinsert it to boot the device again in the normal mode.

Your Nexus S smartphone is now successfully upgraded to Android 4.2 Jelly Bean update.

[Source: Android Advices]