Hi @AnthonyMML    Welcome to TPG Community!   The Yealink wireless IP-DECT phones will not work with your NBN service, since it needs to be configured with the correct SIP settings.   The SIP settings for the TPG NBN VoIP phone is embedded on the TP-Link modem firmware, which can't be taken out due to system security.   The IP phones that you've noticed that we are selling is for our Bizphone. Click here for more information.   Regards, BasilDV ... View more