You can find documentation and potential manual firmware files on the official TP-Link India TL-WR850N Support Page . Ensure you select V3 from the hardware version dropdown menu to avoid damaging your device.
To download and install the fixed firmware for the TP-Link TL-WR850N V3 Tp-link Tl-wr850n V3 Firmware Download Fixed India
: Delivers speeds up to 300Mbps on the 2.4GHz band, suitable for HD streaming and online gaming. You can find documentation and potential manual firmware
Here is how to get the for the TL-WR850N V3 (India Region): Tp-link Tl-wr850n V3 Firmware Download Fixed India