Xiaomi Redmi 1S has a 4.7″ 720p IPS LCD display, Snapdragon 400 chipset with quad-core 1.6GHz processor, 1GB of RAM and 8GB internal storage. It has an 8MP shooter with 1080 video capture capability, and is powered by a 2000mAh battery. As with all Xiaomi Android smartphone devices, the Xiaomi Redmi 1S runs Xiaomi’s own user interface, MIUI, on top of Android 4.3 Jelly Bean.
Senior XDA member saurabhrck has shared the Mokee-50.1-armani test build, originally built by developer syhost for Xiaomi Redmi 1S. This will upgrade the phone to Android 5.0.1.