This method requires your router to be connected to the internet. It's the easiest way, but not always available for older models like the D810R.
Before flashing new firmware onto your Tenda D810R, you must take a few precautionary steps. Failing to do so can interrupt the installation process and permanently damage ("brick") your modem router.
: Always perform the update via a wired Ethernet connection; updating over Wi-Fi is unstable and can lead to corruption. Step-by-Step Update Guide Access Settings tenda d810r firmware update
Firmware is the embedded software that runs your router. Updating it (often called flashing) is important for several reasons:
Tenda D810R Firmware: Maintaining Your ADSL2+ Modem Router This method requires your router to be connected
power off the router during this process. It will automatically reboot once the installation is complete. Factory Reset (Optional)
A login screen appeared. They entered the default credentials: Failing to do so can interrupt the installation
The router may have performed a factory reset. Try logging in using the default admin password. If your computer cannot connect, clear your browser cache or try an alternative browser.