Hi @Knoxy1984, you will need to login into the Optus modem settings to change the Wi-Fi password. Just type the modem IP address (listed at the bottom or back of the modem - sticker) in a web browser. It will then prompt you the enter the username / password. This is also listed on the sticker (called modem username / password). Once logged in go into Wi-Fi section to change the password. Please refer to this → support page for more info.