: Never update firmware over Wi-Fi. Connect your computer directly to one of the router's LAN ports using an Ethernet cable.
Ensure your router is specifically the V3 model. Installing firmware for a different hardware version (like V1 or V2) can permanently damage the device. Tp-link Router Firmware Update Tl-wr850n V3
Before starting, follow these safety precautions to avoid "bricking" (permanently damaging) your router: : Never update firmware over Wi-Fi
Turn the router over; the label will show "Ver:X.Y" (e.g., Ver:3.0 or Ver:3.8). Web Interface: Log in to the management page (default tplinkwifi.net the label will show "Ver:X.Y" (e.g.