The LG G2 is the successor to the 2012 Optimus G and 2013 Optius G Pro. The G2 is powered by a 2.26GHz quad-core Snapdragon 800 processor, with 2GB of RAM. The IPS display of the G2 comes in at 5.2″ with a 1080p resolution. Internal storage comes in 16GB or 32GB, which is not expandable. The G2 utilizes advanced audio hardware to support 24-bit/192KHz audio. The G2 has a 13MP rear facing camera, and is powered by a non-removable 3000mAh battery.
After the G2, the G3 has also been released. G2 is supposed to get Android 5.0 official update but it is behind G3 in the pecking order. In the meantime, you can manually install Android 5.0 via the CM 12 custom ROM on the G2. Follow the guide given below.