Disconnect your Wi-Fi. Plug an Ethernet cable directly from your computer’s LAN port into one of the yellow LAN ports on the back of the D810R.
Connect your computer to the router via Ethernet and enter 192.168.1.1 (or 192.168.0.1 ) in your browser. Log in with your credentials; the default is often admin . tenda d810r firmware update
update via Wi-Fi, as a connection drop during the process can permanently damage (brick) the device. Stable Power Disconnect your Wi-Fi
Later firmware versions for the D810R might include improved Quality of Service (QoS) rules, better IPTV passthrough support, or fixes for the infamous “Wi-Fi disconnects when ADSL re-syncs” bug. better IPTV passthrough support