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Update Sprint Galaxy Nexus to Android 4.2.1 with JBSourcery Custom ROM

Even though your Sprint Galaxy Nexus is currently running the latest Android OS, you can still improve its system and the Jelly Bean user experience and this by installing a custom ROM firmware. The JBSourcery software is the latest custom ROM that has been made available by those of xda-developers for you Galaxy Nexus L700, so today we will be checking in how to apply this update on your phone. The firmware is being based on the Android 4.2.1 Jelly Bean build JOP40D platform so it will bring stock and extra features and capabilities to your Nexus device.

Now, the JBSourcery ROM should be perfect for those who want to change the classic Android flavor, as we all know that the Samsung Galaxy Nexus only offers the pure Jelly Bean system. Furthermore, the firmware is bringing new features to your phone, ones that cannot be found in the default version of the Android OS, so you will be able to improve and power up the performances of your device. Also, the battery life will be upgraded therefore you have all the reasons for trying the Android 4.2.1 Jelly Bean build JOP40D based JBSourcery software on your Galaxy Nexus L700.

For those who aren’t used with these types of operations, it must be clear that the JBSourcery OS is a custom ROM and not an official update released by Samsung or Google for the Sprint Galaxy Nexus. As mentioned, the firmware has been developed by those of xda-developers so you cannot OTA or by using KIES apply the same on your phone. You need to complete a manual procedure, the same being explained during the present step by step guide. By using the lines from below you will be able to prepare the handset for the installation procedure and also flash the Android 4.2.1 powered JBSourcery on the Galaxy Nexus, so you have nothing to worry about.

First, let’s see what you have to do for preparing the device; for that you must read and apply the next list where I have summarized the essential and general pre requisites. Do check all the following lines; don’t skip anything as you can end up in bricking your smartphone.

  • I recommend you to backup the Galaxy Nexus data before applying anything else. You will have to make a wipe so everything that is on your phone will be erased. If you have nothing important to lose, at least save your contacts, EFS, text messages, call logs and internet settings.
  • It is a good idea to make a Nandroid backup too for being able to restore the stock ROM in case you will need to.
  • Root the Sprint Galaxy Nexus, because the JBSourcery OS can be installed only on a rooted system.
  • The warranty will get void, so be careful in what you do and try not to mess things up.
  • Install a custom recovery image, like CWM recovery, on your smartphone. This tool is extremely important for us so make sure you complete this step (take note that the recovery image can be flashed only on a rooted OS).
  • The warranty can be restored but only by revoking the root access and relocking the bootloader of your Nexus. For that, you will have to downgrade to stock firmware or update with an official software released by Samsung.
  • You will have to use a computer and the USB cord of your phone.
  • The phone must be charged before going any further and the USB debugging option should be enabled.
  • Also, on both computer and handset you should deactivate or uninstall the security programs because these tools can interfere with our work.

Those were the pre requisites that must be performed before heading to the update stage. Remember that this tutorial is suitable only with the Sprint version of the Samsung Galaxy Nexus model number L700, so don’t try to apply the Android jelly Bean 4.2.1 based JBSourcery custom ROM on a similar phone as you will brick your device.

How to Update Sprint Galaxy Nexus to Android 4.2.1 with JBSourcery Custom ROM Firmware

  1. On the first step you need to download the update file.
  2. You have the proper download link here, so use the same.
  3. Also, download the Google Apps package from here, as it is not include in the update file.
  4. Save the files on your computer first.
  5. Then, copy-paste the same on your device via USB cable.
  6. Unplug the USB cord and turn off the phone.
  7. Reboot it into recovery mode.
  8. The Galaxy Nexus can be booted in recovery mode by pressing and holding the Volume Up, Volume Down, and Power buttons together. The fastboot mode will be displayed so from there just choose “recovery”.
  9. From recovery first wipe the data by selecting “wipe data factory reset”, “wipe cache partition” and “wipe dalvik cache”.
  10. Return by selecting “+++go back+++”.
  11. And from the main menu choose “install zip from sd card” followed by “choose zip from sd card”.
  12. Pick the update file which was downloaded before and apply it on your handset.
  13. Then, repeat the step and apply the Google Apps package too.
  14. In the end, from recovery select “+++go back+++” and “reboot system now”.

That was all guys. If the first boot will take longer than usual, don’t panic that’s normal. Also, if you get a boot loop, reboot into recovery once more and wipe the system again as showed during the above steps. Also, you can use the recovery menu for restoring the stock ROM if needed (only if you previously made a Nandroid backup).

Well, now your Sprint Samsung Galaxy Nexus has been updated with the Android 4.2.1 Jelly Bean based JBSourcery Custom ROM Firmware. Test the software and tell us how it performs on your handset; also do share your impressions and thoughts with us and with other users by using the comments area from below.

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