The device has a 13MP rear camera with PDAF (phase detection autofocus) for faster focusing, and supports 1080P full HD video recording.
Redmi 4 possesses a 5MP, f/2.0 aperture front facing camera as well.
The smartphone comes in three variants - 2GB RAM + 16GB ROM, 3GB + 32GB, and 4GB + 64GB, and is expandable up to 128GB with a microSD card.
It supports 4G LTE and VoLTE out of the box, covering all India LTE bands.

 Redmi 4 runs on Android 6.0.1 with MIUI 8 and will be upgraded to Android N very soon. It comes in gold and matte black metal colour variants.

Redmi 4 will be available on 23rd May 2017 at 12 noon on and The 2GB RAM + 16GB ROM variant is priced at INR 6,999 and 3GB + 32GB
variant will be available for INR 8,999. The 4GB + 64GB variant will be launched at INR 10,999 by June end.
Key features of Redmi 4:

    • Qualcomm Snapdragon 435 Octa-core processor and an Adreno 505 GPU

    • 4100mAh (typ) battery that can last for 2 days under regular usage

    • 13MP PDAF (phase detection autofocus) camera, 5MP, f/2.0 front with Beautify mode

    • 5-inch HD display

    • Metal body with fingerprint sensor. 2.5D curved glass

    • Dual SIM (3-choose-2 hybrid SIM tray)

    • LTE and VoLTE support

    • Three variants: 2GB RAM + 16GB Flash, 3GB + 32GB, and 4GB + 64GB

    • Up to 128GB microSD expandable storage

    • Available in Black and Gold colours

    • MIUI 8 based on Android 6.0
Mi Router 3C

Xiaomi also launched Mi Router 3C, its first smart router in India. 
Mi Router 3C has 64 MB of RAM and offers a wireless speed of 300mbps.
It can connect up to 64 devices including 20 computing devices and 44 IoT devices.