CyanogenMod 12.1 ROM for LG G3 D855 (Android 5.1 Lollipop)

The most popular custom ROM for Android devices, CyanogenMod 12.1 is now available for the LG G3 D855 variant. CyanogenMod 12.1 is the latest ROM version after CM12 that brings Android 5.1 Lollipop on the table, leaving Android 5.0 behind.

LG updated the LG G3 D855 variant to official Android 5.0 Lollipop firmware a few months ago. LG was among the first companies to update its flagship device to official Android 5.0 Lollipop. While the company quickly making the LG G3 one of the first smartphones to run on official Android 5.0 Lollipop, it is struggling to provide a stable update based on Android 5.1.

Android 5.1 has already made its way to a handful of smartphones but the LG G3 is not of them at the moment and LG hasn’t announced any possible release dates for the update. If you can’t wait to taste Android 5.1 Lollipop on your phone, Life Walker has released a CyanogenMod 12.1 build for the LG G3 D855.

CyanogenMod 12.1 ROM for the LG G3 features Android 5.1 Lollipop with all the latest features and options. Since the ROM is not developed by the CyanogenMod team, the build is not completely stable. There are bugs present like no data connection and WiFi issues. If these bugs do not stop you from installing the ROM, follow the guide below.

How To Update LG G3 D855 To Android 5.1 Lollipop With CyanogenMod 12.1 Custom ROM

Note: This CyanogenMod 12.1 ROM build is designed for the LG G3 D855 variant only. Do not try installing the ROM on other variants or other devices because you can end up bricking your phone.

Warning: Flashing the CyanogenMod 12.1 is not safe. It is a custom ROM and you can damage your phone if you do not follow the instructions. NaldoTech shall not be held responsible for anything that might happen to your phone.


Check the battery level percentage and make sure that it is above 70%.

Install LG G3 TWRP custom recovery.

Make a full Nandroid system backup.

Download ROM & Gapps

Flashing ROM

  1. Download the ROM and Gapps on your computer or your phone. If you have downloaded them on your PC, connect your phone and transfer the zip files to the internal storage.
  2. Press the power button to turn the phone off.
  3. Press the volume down and power buttons and do not release them until the LG logo appears. Press them again until the phone displays the Hard Reset menu.
  4. In recovery, wipe data and perform a factory reset to clean the phone.
  5. Select and flash the CyanogenMod 12.1 ROM and then Lollipop Gapps.

The first boot may take a while since the phone will be running a brand new version of Android. Once the phone boots up, you will enjoy the Android 5.1 Lollipop experience on your LG G3 D855 thanks to CyanogenMod 12.1.


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