I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.
If it is just an access point then you can’t put the VM hub into modem mode since then there is nothing providing the routing and NAT functions. In this case, leave the hub in router mode but go into the web interface for it and disable both the 2.4 and 5 GHz wireless bands.