Check the label on the bottom of your router. Firmware for v3.0 will work on v4.0. Get the correct file from the Tenda Support Center Wired Connection: Always use an Ethernet cable
depend strictly on your hardware version (V3.0 or V4.0). You tenda f3 firmware update latest version
after the update to ensure all new features function correctly. Why Update? Regular updates address security vulnerabilities wireless stability , and fix known bugs such as WAN ping or dial-up issues. Tenda F3 300Mbps wireless router - Tenda Global Check the label on the bottom of your router