Samsung Galaxy S Plus is a slightly updated version of the Galaxy S. It comes with 1.4GHz Processor and 512MB RAM. It has a 4 Inch Super AMOLED Display, TouchWiz 3.0 UI, 5MP primary camera With 720P Video Recording, Android OS V2.3, 8GB Storage and a 1650 MAh Battery.
Galaxy S Plus is more than 3 years old, so Samsung has discontinued the official OTA updates for this phone. But Android Lollipop can still be installed on this device via the CM 12 custom ROM. This is a highly functional build with almost all working features except the power-off changing animations. Follow the guide to install CM 12 on the Galaxy S Plus.