Can i update firmware on router with no physical access to it?

Question

My friend has a router that is locked inside a metal box and i called him and asked him if i could update the firmware to it he said yes. My question is if i could update the firmware by wifi or do i need to be there to move some stuff around?

Answer 1

Depends on the type of router.

Answer 2

Most web MUIs have a way to update the firmware through it.  Log in and check it out.