Hi   I've bought a modem TP-link vx420-g2h from a person who didn't mention it was a TPG supplied modem and then refused to take the modem back.    The internet works fine, but the Voip, which was one of the main reason to get this modem, doesn't have a section on the interface to modify the Voip settings, which I got from my ISP, Spintel.    Is there a way to gain access to the telephony section, as shown on TP-link website? I contacted TP-link and they replied to try to get assistance from TPG. Maybe a different firmware version that is not locking the Voip section and instructions how to upload?   Regards I'm a mobile phone TPG customer, but not for NBN. ... View more