Chances for getting official Android Marshmallow update for LG G3 Beat is nil, but you can upgrade the device to Android 6.0 Marshmallow via CyanogenMod 13 ROM (CM13). The LG G3 Beat is a low spec variant of flagship LG G3 and runs on the Android Lollipop. However if you want to update your phone to the new Android 6, the best decision would be flashing official CM13 custom ROM on it.
In this guide, we will show you how to install CyanogenMod 13 (Android 6.0) on LG G3 Beat. CyanogenMod has released CM13 Nightly for LG G3 Beat and for few other mid-range LG smartphones, such as LG G2 Mini and LG Optimus L70 that brings Marshmallow and enables users to customize their phone completely.
Before you get start, we remind you that the current status of CM 13 for LG G3 Beat is Nightly, which means the ROM is unstable, buggy and may not have full features. However, previous experience shows that the CM nightly builds are typically reliable that many users do not mind facing a few issues.
Disclaimer: Follow the guide at your own risk. We will not be responsible for any damage that occurs. The guide is intended for technically talented users only. Backup every data on your phone.
1. Your device should be rooted and have latest version of TWRP recovery installed on it. If not, follow this guide [HERE]
3. Save both CM13 ROM zip file and Gaps zip file to your phone’s SD card.
4. Reboot your phone into TWRP recovery. To do so, switch off your phone and hold Volume down & Power buttons. When the LG logo appears, release the buttons and then press them again. Then, press the Power button three times.
5. In recovery, select backup option, and then make a backup of your current ROM.
6. Now, perform wipe data/factory reset, cache partition and dalvik cache. Select ‘Wipe’ option to perform the wipe.
7. In recovery, tap on Install and select the CM13 zip file. Then, slide the button on the bottom to start the flashing process. Do the same for Gapps as well.
8. Before rebooting, once again wipe cache partition and data, and then reboot your phone.
The first boot will takes little more time. Once booted up, set up your phone and enjoy Android 6.0 Marshmallow.
Have any doubt? leave it in the comment section to get help.