I have a mesh router NetGear Orbi. Previously, it was connected to an NBN modem, but I am moving to a new house where there is no NBN yet so I want to sign up for 4G wireless broadband. If I sign up for 4G wireless broadband TPG is going to send me a 4G modem. I want to plug my router into the TPG-provided modem and keep using my router to provide WiFi across my premises to access Internet. Is that possible with a TPG-provided modem?