If you see messages like "Error to update firmware" or "Firmware file is too large," the issue is almost always due to a hardware/firmware mismatch. Double-check the hardware version on the sticker, then re-download the firmware specifically for that version. Also, ensure you are using a wired Ethernet connection.
: Updates protect against known exploits and hackers. For example, recent reports highlight the importance of monitoring for patches related to specific CSRF vulnerabilities in the F3 model. tenda f3 firmware update latest version