Update Verizon LG G3 and AT&T LG G3 on Android 5.1.1 Lollipop with CM12.1 ‘Nightly’ ROM


Android 5.1.1 Lollipop based CM12.1 ‘Nightly’ build is now available for Verizon LG G3 and AT&T LG G3. In this guide we are here at Thunderztech.com to help you on the complete process to install Android 5.1.1 Lollipop custom ROM on your LG G3. LG G3 is a wonderful device with powerful hardware components capable of running latest firmware smoothly, LG G3 has received stock firmware updates with Android version 5.0.2 Lollipop but now developers at CyanogenMod developed the latest Android 5.1.1 Lollipop build for LG G3 and it is already tested on many devices running smoothly. The CyanogenMod ROM is not only based on Android 5.1.1 latest version but also it has integrated OTA system to update the firmware with any future update.


There are multiple benefits of installing custom ROM on your LG G3 which unfortunately can’t find in the stock firmware. The Custom ROMs gives you freedom to overclock CPU, install tweaking mods and tons of other softwares to enhance device performance further you can install themes to customize the device look. Before flashing the ROM you must remember that its a ‘Nightly’ update which means that the firmware is still in the testing stage you may experience some bugs however everything is working fine feel free to flash the latest Android 5.1.1 Lollipop firmware with CM12.1 on your LG G3. Below we have mentioned the complete procedure along tools needed to flash the Custom ROM on your device.

How to install Android 5.1.1 Lollipop on Verizon LG G3 & AT&T LG G3 with CyanogenMod 12.1 ‘Nightly’ ROM

Disclaimer: This tutorial includes multiple operations which includes Installing Custom ROMs, Custom recovery and root. Follow the guide on your own risk, we are not responsible if you brick or damage your device however the chances of bricking a device are rare but you have to pay full attention on the complete guide to avoid any issues and difficulties while performing any of the above mentioned operation.


  • Please ensure your phone battery should be charged at minimum 80%
  • Download and install latest LG USB drivers
  • Your device should have a working CWM or TWRP recovery installed.

Download Android 5.1.1 Lollipop build for your LG G3 from the below provided link

Download cm-12.1-latest-NIGHTLY-vs985.zip (Verizon LG G3)

Download cm-12.1-latest-NIGHTLY-d850.zip (AT&T LG G3)

Download Android 5.1.1 Lollipop Gapps

Process to install Android 5.1.1 Lollipop on LG G3 via CM12.1 ‘Nightly’

In this tutorial we are using the ClockworkMod recovery flash process.

Turn of your device and boot into CWM custom Recovery menu by the hardware keys combination or using any third party app (Mostly found in Play store).

Once your device enters into CWM recovery, create a Nandroid backup of your device or follow our guide to create a Nandroid backup (this will create a backup of your complete device including current firmware) if something goes wrong you can restore your previous firmware.

Once the Nandroid process completes, navigate and select wipe data/factory reset.(this will erase your data)

Now it’s the time to flash the CM12.1 ROM on your device. Choose “install zip from sdcard” >> choose zip from sdcard & navigate to the folder in which you have copied the custom ROM.zip file and select it.

Select “yes” to confirm install, wait for a few minutes till the file is completely installed in your device.

Once done with the above step, now apply the same process with the installation of Android 5.1.1 Lollipop Gapps.

Wait for the installation process to complete. The first boot up may take 5-7 minutes.

If your device is taking longer then 7-10 minutes then follow this guide to to fix this issue 

That’s it! You have successfully installed Android 5.1.1 Lollipop via CM12.1 Nightly on your LG G3, experience the latest features of Android 5.1.1 Lollipop via CM12.1 custom ROM on your device. If you have any query feel free to contact us by posting your queries in the below provided comment section. Follow us on Facebook/Twitter/Google+ for future update.

A Software Engineer who loves to hang around latest gadgets and writes his own experiences to get the best possible and accurate information.
No Comments

    Leave a reply