LG G3 S features a 5-inch IPS display offering 294ppi pixel density. The screen resolution has been dropped to 720×1280 pixels as compared to the QHD resolution of the LG G3. LG G3 S is powered by a 1.2GHz quad-core Snapdragon 400 processor clubbed with 1GB of RAM. It comes with 8GB of inbuilt storage with microSD card expansion and is backed by a 2540mAh battery. G3 S features an 8 MP rear camera with Laser Autofocus feature seen on the G3, while the front camera will be 1.3 MP.
LG G3 S was upgradable only till Android Lollipop. LG wont provide official support for G3 S. Not to worry, as CyanogenMod team have created a custom CM 13 ROM running on Android Marshmallow. It is an official nightly and has very few bugs. Follow the guide below.