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Update Google Nexus 7 with Official CM 10.1 Jelly Bean 4.2.1 Custom ROM

After we have brought you the list of devices that are scheduled to receive the official CM 10.1 Android 4.2.1 firmware, now I will show you how to update your Asus Google Nexus 7 to latest Jelly Bean OS, by installing the mentioned custom ROM into your tablet’s system. This step by step guide is not hard to complete, but there are numerous tasks to take care of. Furthermore, this is a complex operation that is being considered risky for your Nexus 7 handset, so I recommend you to read all the following lines for being able to safely apply the CM 10.1 software.

As mentioned, this is the official version of the CM 10.1 ROM, meaning that the same has been released by the CM team for your Asus Nexus 7 Android based tablet. The software is being powered by the Android 4.2.1 Jelly Bean OS, so you will be updating your device to the latest features available. Also, CM 10.1 is a custom ROM which means that the firmware will bring its own features, apps and looks, so you will not be able to enjoy the pure Android flavor that’s appropriate to a Nexus device.

In order to conclude, here is what CM 10.1 will do for your Google Nexus 7: first, the Android 4.2.1 software will be installed; then you will gain more access to the internal system of your tablet; next, all the performances will be improved thanks to the new features which will be flashed; you will gain speed, the battery life will be upgraded and all the internal system will be optimized and customized. If you want all that for your Asus Nexus 7, then go ahead and complete this tutorial. Begin with the pre requisites listed below, and then end the procedure by applying the steps that will guide you through the installation process.

  • Remember that this operation isn’t an official one; the update isn’t coming from Asus or from Google, so you will install a custom Android 4.2.1 Jelly Bean based software on your Nexus 7.
  • So, backup the data that is being saved on your handset before going any further.
  • You can use our backup and restore guides for completing a full and safe backup operation; just check out our how to section for the same.
  • Also, if your device is rooted and installed with a custom recovery image it is recommended to make a Nandroid backup too.
  • As soon as the backup is applied you should gain root access for your Asus Nexus 7.
  • By doing the same the warranty will be void. Don’t worry, you should be fine if you are performing the update and root operations by following a step by step guide like the present one.
  • The warranty can be restored; all you have to do is to downgrade the Nexus 7 to stock ROM, or update with an official software (the CM 10.1 firmware will be replaced with the new OS).
  • Install a custom recovery image on your handset. Be sure that you are applying this step as without this tool you will not be able to flash the CM 10.1 Jelly Bean 4.2.1 platform.
  • On the computer you will use there shouldn’t be any security tools running; if different the mentioned programs will interfere with the update process.
  • The tablet should be fully charged, or there should be at least 60% power left; if different the Nexus 7 might get turned off during the installation procedure.
  • Enable the USB debugging option by going to “Settings -> Applications -> Development -> USB debugging”.
  • Don’t make any other changes, just make sure that you are completing this tutorial only for updating the Asus Google Nexus 7 with CM 10.1 Android 4.2.1 custom ROM firmware.

How to Update Google Nexus 7 with Official CM 10.1 Jelly Bean 4.2.1 Custom ROM Firmware

  1. Download the update from here and save the file on your computer.
  2. The Google Apps package is not included in the CM 10.1 file, so you will have to download and install it separately.
  3. The download link for the Google apps is here (also save this file on your computer).
  4. Use the USB cord and connect the device with the computer; then copy all the downloaded files from the computer to your tablet.
  5. Recovery mode must be entered on your handset.
  6. For that, first turn off the Nexus 7. Then reboot and enter CWM recovery.
  7. From the recovery menu, you should start the procedure by applying a wipe.
  8. For the wipe select “wipe data factory reset” and “wipe cache partition”.
  9. Return to the main menu “+++go back+++”.
  10. And up next select “install zip from sd card” followed by “choose zip from sd card”.
  11. Select the update file (the CM 10.1 one) and apply the same on your Asus Nexus 7.
  12. When the update is installed, you should repeat the step and flash the Google apps package too.
  13. In the end, from the recovery image select “+++go back+++” and “reboot system now”, and you are done.

Well, now your pure Android Asus Google Nexus 7 is running the CM10.1 custom ROM firmware. The Jelly Bean 4.2.1 firmware has been updated to your tablet, so test the new software and see how it performs and if you like it more than the stock one. If not, you can restore the stock ROM by re-using the CWM recovery mode menu. That’s all for now, but stay close for further step by step guides and Android related news.

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