Updating your firmware may erase your current settings, so it is recommended to back up your configuration before starting.
Because the D305 is end-of-life and security updates are no longer provided, with a newer modem/router (e.g., Tenda V300 or AC series) to maintain security and performance. tenda d305 firmware update link
Could youI can help you troubleshoot the connection if the update doesn't start. Download Center - Tenda Global Updating your firmware may erase your current settings,
Before clicking download, you must check your device's hardware version. with a newer modem/router (e.g.
“Thank you. The link is still alive. But just in case—here’s a mirror.”
and select the unzipped firmware file you downloaded earlier.