Hi @hio77. I just had a quick peek at the start up guide in the link: https://www.spark.co.nz/content/dam/telecomcms/Hero-images/internet/Spark%20Smart%20Modem%20QSG_Final%20Print.pdf
It's missing the browser address to login to the modem. Is it still 192.168.1.254 like your other modems? Can the WPS button be disabled in the modem settings? And can the wifi name and wifi password be changed? Also wanting to check if the modem has a built in firewall. Thanks!