Samsung Galaxy Grand is a mid range device which was launched last year. It has a Dual-core 1.2 GHz Cortex-A9 processor, 8 GB of internal memory and 1 GB of RAM. Galaxy Grand consists of 8 MP primary camera and 2 MP secondary camera. It initially ran on Android 4.1 and it is upgradable to Android 4.2.
Galaxy Grand is listed among the devices to get the Android KitKat update but it still hasn’t received it yet. However you can update it via custom ROMs. CM 11 custom ROM is available for the Galaxy Grand running on Android 4.4.1. Follow the instructions given below to install Android 4.4.1 on the Galaxy Grand Duos.