Always download firmware from official sources to avoid malware. F3 v6.0 Datasheet - Tenda Global(English)
Before searching for a download, you must verify that you actually have the hardware version. Installing firmware for the wrong version (such as V1.0 or V3.0) can "brick" your router, making it unusable. Tenda F3 V6 Firmware
Tenda F3 V6 Firmware: A Comprehensive Guide to Upgrading and Optimizing Your Router Keeping your Tenda F3 V6 router Always download firmware from official sources to avoid
Turn your router over and look for a sticker on the bottom. Locate the serial number; next to it, you should see a string like “V: 6.0” . next to it