Samsung Galaxy S3 Mini was released a year back. It is the cheaper version of Samsung Galaxy S3. It has a 4″ Super AMOLED display with a resolution of 480×800 pixels (233ppi). It runs on a dual core Cortex A9 processor clocked at 1GHz. It has 1GB of RAM. S3 Mini runs on Android 4.1 Jelly Bean OS.
Android 4.4 is the latest Android OS and the CM 11 custom ROM running on Android 4.4 is available for a variety of devices. It is also available for Galaxy S3 Mini. It is still undergoing development but it is stable enough for day to day use. Follow the instructions given below to install it on the S3 Mini.