Hi @AndyD1,   If you recently upgraded the service from TPG ADSL2+ to TPG NBN the home phone there is a possibility that you're unable to receive a call overseas while the home phone is in the process of porting but this take usually 1-5 working days.   Does this issue affect the local calls? Note: Porting process will affect both international and local incoming calls and once it is done normal phone service should work.   Normal Telephones should work with the NBN service. Ensure that it is connected to the correct port to work. If you have NBN FTTP it should be connected to the NBN Box's Telephone Port and if you have NBN FTTC, FTTN, HFC it must be directly connected to the modem/router's phone port.   Cheers!   ... View more