Xiaomi Redmi 3S smartphone comes with a 5.00-inch touchscreen display with a resolution of 720 pixels by 1280 pixels.The Xiaomi Redmi 3S is powered by 1.1GHz octa-core processor and it comes with 2GB of RAM. The phone packs 16GB of internal storage that can be expanded up to 128GB via a microSD card. As far as the cameras are concerned, the Xiaomi Redmi 3S packs a 13-megapixel primary camera on the rear and a 5-megapixel front shooter for selfies.The Xiaomi Redmi 3S is a Dual-SIM (GSM and GSM) smartphone that accepts Micro-SIM and Nano-SIM. Connectivity options include Wi-Fi, GPS, Bluetooth, Infrared, USB OTG, FM, 3G and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include Compass/ Magnetometer, Proximity sensor, Accelerometer, Ambient light sensor and Gyroscope.