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Update Google Nexus S with JellyBam Android 4.2.1 Custom ROM

Even though the Samsung Google Nexus S will not receive the Android 4.2 Jelly Bean official OS, you can still update your device with the latest features and apps available and this by installing a suitable custom ROM. But there are a lot of custom updates released for your Nexus S, so you might have hard times in choosing the perfect firmware for your handset. That’s why I will try to help you out by showing how to install the CM10.1 and AOKP based Jellybam ROM on the Google Nexus S.

The Jellybam platform is the most powerful update available for your Nexus S as the system is coming with important features, apps and capabilities, not to mention that Jelly Bean 4.2.1 OS is being included. Of course you will get a custom Android 4.2.1 firmware as the present update isn’t an official software released by Google or Samsung. But, as mentioned, Jellybam is being based on the CM10.1 and AOKP platforms so features from both ROMs will be ported to your Nexus S smartphone. If you want to learn how to update your phone with the same, check the following lines and apply the steps from below.

The Jellybam Android 4.2.1 firmware will power up the performances of your Nexus S by customizing and optimizing the internal system; in this way you will be able to gain speed, enjoy the upgraded battery life and also change the appearance and the looks. Of course in order to make a proper idea about this update you should check the features list, so for that I recommend you to read our source page, by using this link. Then, return here and resume the rest of the tutorial because you do have to prepare your handset before starting the update operation.

If you have decided to install the CM10.1 and AOKP powered JellyBam Android 4.2.1 Jelly Bean custom ROM on your Google Nexus S, then you should start with a root operation. You see, the firmware cannot be applied unless your handset is rooted and installed with a custom recovery image. The ROM needs to access some internal files, this access being granted as soon as you root the system and then, the recovery image will be used for installing the .zip update file on your Samsung Nexus S.

Unfortunately, all the mentioned operations are unofficial ones, so by performing the same the Nexus S warranty will be void. For the future, if you will need to restore the warranty you will have to downgrade to stock ROM. Also the warranty can be restored only if you reset the flash counter of your handset and by doing the same we understand if the following: the root access is revoked, the bootloader relocked and all the factory restrictions reinstalled.

As we will be checking on how to manually update the Google Nexus S with the Jellybam custom ROM, you will have to use a Windows running computer and also use your phone’s USB cable for connecting the smartphone with the mentioned computer. In order to avoid the unpleasant situations you will have to deactivate all the security tools from the computer and phone and to charge the battery of your Nexus S (if you notice that there is only 60% power left). Also, you need to enable the USB debugging option on your smartphone and apply the installation procedure only for the Samsung Google Nexus S device because this variant of JellyBam is working only on the mentioned handset.

Before starting the update operation I recommend you to backup the Nexus S data. Make a Nandroid backup and also save everything you need, like contacts, messages, EFS, market apps and so on. A wipe will have to be applied (else the Android 4.2.1 Jellybam ROM cannot be installed) meaning that all of your personal saves will be erased. After completing the backup you can safely head to the next, and also final, section of the present step by step guide.

How to Update Google Nexus S with JellyBam Android 4.2.1 Custom ROM Firmware

  1. Download the update file from this page.
  2. Save the file on your computer.
  3. Then, connect the phone with the PC via USB cable.
  4. Copy-paste the downloaded file on your handset.
  5. Unplug the USB cable and turn off the Nexus S.
  6. You need to reboot into recovery mode.
  7. By using the recovery mode menu first select “wipe data factory reset”, “wipe cache partition” and “wipe dalvik cache”.
  8. Press “+++go back+++” and return to the main menu.
  9. Now, select “install zip from sd card” followed by “choose zip from sd card”.
  10. You can now select the update file from your device and start the update process.
  11. Wait while the installation procedure is running.
  12. In the end, from the recovery menu select “+++go back+++” and “reboot system now”.
  13. If you will get a boot loop, you will have to reboot into recovery once more and apply the wipe option again.

That was all; you have successfully completed the step by step guide. Now your Google Nexus S is running the CM10.1 and AOKP based JellyBam Android 4.2.1 custom ROM firmware. The software has been developed and released by those of xda-developers so we have them to thanks for the present tutorial. If you have questions or if you want to share something with us, use the comments area from below.

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