Xiaomi Redmi 1s comes with Android OS, v4.3(Jelly Bean).
Xiaomi offers 4.7 inch Capacitive display and Multiple touch with MIUI v5.0.
It is powered by Quad-core 1.6 GHz Cortex-A7 processor and loaded with Qualcomm MSM8228 Snapdragon chipset and it incorporated with 1 GB RAM, 8 GB internal storage with Micro SD card support upto 32GB.
It has good camera features, 8MP rear camera and 1.6MP front camera and many other additional features like Autofocus, LED flash, Geo-tagging, touch focus, face detection, HDR.
Supports almost all Connectivity like bluetooth, Wifi, GPS, 3G and USB.
Hardware quality is good.
Many color options are available.
Battery back up is just satisfactory.