You can either consult the manual or go to the manufacturer's website for instructions on how to update the firmware on your individual router.
Ị nwere ike ịjụ akwụkwọ ntuziaka ahụ ma ọ bụ gaa na ebe nrụọrụ weebụ nke onye na-emepụta maka ntụziaka banyere otu esi emelite ngwa ngwa na onye ntanetị gị.