According to the manufacturer, my handset is 4G, 5G and VoLTE capable - a fact that seems to be borne out when i use this code to display the phone information: *#*#4636#*#*   And yet, since the TPG 3G network shut down, I have been unable to make or receive voice calls.   In TPG's 3G shut down FAQ, it says, "Some 4G handsets may also need settings changes to be able to continue to make and receive voice calls using our 4G network." https://support.tpg.com.au/3g-network-closure-faq   Could anyone tell me what those "settings changes" would be? I'm keen to try them - and I can't find any guidance on what they might be.   Alternatively, is TPG not able to add my phone to a "whitelist" so that it will work with TPG's 4G network?   ... View more