UPDATE or Upgrade any wifi router firmware with file just few steps to follow you can download the firmware file from your wifi router web page like tp link goto tplink.com access download find you specific model number as mention in the back of your router download it and then follow this video how to flash this process is same for all router it could be ptcl, tplink, tenda, netgear or etc.
Video Tutorial to flash is below
Download firmware from below
Or Download
Tags
netgear frimware
ptcl fiwmare
router firmware update
tenda firmware
touter firmware
tplink firmware
update firmwre