Flash firmware with AT commands and then via telnet
atc ATPHYNUM=IMEI,xxxxxxxxxxxxxxxatc ATSN=xxxxxxxxxxxxxxxxatc ATPHYNUM=MAC,xxxxxxxxxxxx
atc 'ATSSID=0,"SSID 1"'atc 'ATSSID=1,"SSID 2"'atc 'ATSSID=2,"SSID 5G 1"'atc 'ATSSID=3,"SSID 5G 2"'
atc 'ATWIKEY=0,"Wi-Fi key"'atc 'ATWIKEY=1,"Wi-Fi key"'atc 'ATWIKEY=2,"Wi-Fi key"'
atc 'ATWIKEY=3,"Wi-Fi key"'
and voila.