Update LG Optimus L9 P760 to Android 4.3 with CM10.2 Custom ROM

Install CM 10.2  Official Nightlies ROM

LG Optimus L9 can be updated to Android 4.3 Jelly Bean OS; even though we are not talking about an official update rolled out by LG or Google, the present firmware is actually better than a stock OTA. Why? Well, quite easy: because we are talking about the CyanogenMod platform. This means that by following the next guidelines you will be able to learn how to install the Nightly build of CM10.2 Android 4.3 JB custom ROM on the LG Optimus L9 model number P760.

CM10.2 is the latest version of CyanogenMod, the system being based on Android 4.3 Jelly Bean firmware. That’s why, when flashing CM10.2, Android 4.3 comes along. Furthermore, CM10.2 is coming with important and unique features, apps and capabilities that can be used for powering up the performances of your Optimus L9, for bumping the speeds and also for upgrading the battery life. Being a custom ROM, the software can be customized and optimized easily so you will be able to “play” with the internal settings and system of your phone. After applying the present update, your smartphone will become your new playground.

The benefits that come with a custom update, such as CM10.2, are numerous, but you will be able to experience them by yourselves. Now, we will be checking on how to manually update your LG Optimus L9 to custom Android 4.3 Jelly Bean OS. Complete the steps from below and everything will be fine; don’t apply things without consulting the guidelines because you can end up in bricking your handset.

Like any other unofficial update, CyanogenMod is a free aftermarket distribution of the Android system, in our case of Android 4.3 Jelly Bean. Basically, the software is coming with its own looks and features on top of the stock system. The custom ROMs are being developed by third party devs so we have to thanks them for their work. But since the update is unofficial, for being able to apply the same on an Android based device you must first root the mentioned handset. By gaining root access you are unchaining the system by removing the factory and default restrictions, so the warranty will get void.

Therefore, root your LG Optimus L9 if you want to flash CM10.2 ROM into its system. As stated before, the warranty of your smartphone will get void, but don’t worry because you will be able to easily restore it. For regaining the warranty you will have to downgrade your L9 to stock Android OS. Now, another thing to prepare before starting the proper guide is the custom recovery image. CWM or any other custom recovery image must be installed on your Optimus L9 because the CM10.2 firmware can be applied only through the mentioned app. Note: CWM recovery can be installed only on rooted devices.

After taking care of these operations, consider in backing up the L9 data. If you have something important saved on the internal storage memory back it all up before going any further because a wipe will be required a little bit later. And since your phone is now rooted and installed with a custom recovery image, make a Nandroid backup too and save the current ROM – if you will not like the CM10.2 Android 4.3 platform then you will be able to easily restore the current Android OS.

Don’t forget to ensure that a computer is near you as you will have to use a PC or notebook where CM10.2 will be downloaded. So, the L9 must be connected with the PC which means that USB debugging option must be enabled; go to “settings -> applications -> development -> usb debugging” and ensure the same. Since the firmware will be downloaded manually, on the computer first of all deactivate the security protection and here I am talking about antivirus, antimalware and Firewall protection. Furthermore, this is a manual update operation so your smartphone must be charged before starting the steps from below (charge the device especially if your phone has less than 60% power left).

Good, now remember that this step by step guide is compatible only with the LG Optimus L9 model number P760. Using the present tutorial for flashing CM10.2 Android 4.3 custom ROM firmware on a different Android based handset will probably brick your beloved device, so try not to mess things up.

How to Update LG Optimus L9 P760 to Android 4.3 with CM10.2 Custom ROM Firmware

  1. On your computer go here; from that page download the CM10.2 update file.
  2. Then, go here and download Google Apps package – Google apps are not included on the CM10.2 system so you will have to install it separately.
  3. Save the downloaded files on desktop; don’t unzip the files.
  4. Take the USB cord and by using the same connect your handset with your computer.
  5. Now, select both files from desktop (the downloaded files) and copy-paste or drag and drop them to your phone’s SD card.
  6. Disconnect your phone from the computer.
  7. Turn off your device as recovery mode must be entered.
  8. Learn how to reboot in recovery.
  9. Then, by using the recovery mode menu select “wipe data factory reset”, “wipe cache partition” and “wipe dalvick cache”.
  10. Return to the main menu of recovery.
  11. Then select “install zip from SD card” followed by “choose zip from SD card”.
  12. Pick the CM10.2 update file.
  13. Flash the same.
  14. Repeat the procedure for installing Google Apps package.
  15. In the end, return to recovery and select “reboot system now”.
  16. Done.

Congratulations, you have installed CM10.2 on your LG Optimus L9 P760. Your smartphone is now running on a custom version of Android 4.3 Jelly Bean OS; since we are dealing with the Nightly release of CM10.2, you should test the firmware as there might be minor bugs or things that aren’t working perfectly. Don’t worry as all the bugs and issues will be soon resolved by the CM team.

  • Joaquim Santos

    does this rom have the Wireless Display feature??

  • Christian Walker

    Does bootloader have to be unlocked in order to apply cm