Xiaomi Redmi 3S Qi Wireless Charging:

Xiaomi Redmi 3S Wireless Charging

Qi Wireless Charging not supported,
but Accessories available.

Unfortunately, your Xiaomi Redmi 3S doesn’t have Qi Wireless Charging integrated. However, you can use a Wireless Charging Adapter for your device to make it Qi compatible, or view the list of all Qi enabled phones.