Select the Unlock-zlt-s25.bin file from your computer.
Connect your PC to the router and go to 192.168.1.1 (or your specific gateway IP). Unlock-zlt-s25.bin
Unlock-zlt-s25.bin file is a firmware or binary configuration file used to "unlock" the Airtel ZLT S25 4G Router (also known as the Airtel Smartbox Select the Unlock-zlt-s25