The version of the ROM that is installed is CyanogenMod 13, so it includes as a base Android Marshmallow, in order to take advantage of such positive options as Doze, personalized permission management and, how or, better management of RAM memory (this is essential in the LG G3s due to its default user interface, which is very “ greedy ”). The fact is that you can take a good qualitative leap and, furthermore, explore all the options offered by this firmware so well known in the Android scene.
There are a couple of details to keep in mind before anything else. The first thing is that all Google applications are included, such as Maps or Play Store, so you will not miss anything. The second detail that is important: the LG G3s has to have root access, something you can get by following the steps in this Android Help article.
The steps to follow
Before proceeding, it is important to make a backup of the data that are in the LG G3s so that, if you have a problem, these are always safe. In addition, the battery charge must be above 90%, so as not to have any surprises. A “Recovery” must also be installed in the terminal, either TWRP or CWM.
Now you have to do what we indicated, being sole responsibility of the user the procedure (by the way, the process is also compatible with the LG G2 Mini and LG Optimus L70:
- Download CyanogenMod 13 Nightlies version for LG G3s, LG G2 Mini and LG Optimus L70
- Get now the Google applications that you will have to install (Gapps) in this link, they are compatible with Android Marshmallow
- Now copy both the ROM and the applications to your LG G3s terminal (any of the other two) and enter Recovery Mode
- Now in the interface that appears, look for the Install option and select the ZIP file with CyanogenMod 13. Confirm and the process will begin
- Restart the terminal and do the exact same thing with the ZIP file with Google applications
- Once this is done, it only remains that you enjoy the new firmware on your LG G3s
The time it takes to do this is no more than a few minutes, so it’s worth giving it a try. Other tutorials for devices with Google’s operating system can be found in this section of Android Help.