No service in Boston, Massachusets

[Alistair+Murray]

Arrived in the US last Monday, and did not receive a welcome message on my mobile. Have had no service since I arrived. Went to Vegas on Thursday and got no service there either. Now back in Boston today and still no service. Any ideas folks? Using an Honor 90 mobile phone. Tried manually selecting a network, no joy. Tried adding an APN too, no joy.

[daveNOS]

@Alistair+Murray I believe you need VOLTE active on your phone to use it in the USA, have a look at the following Go to Settings > Mobile network > Mobile data . In the network settings area of SIM 1 or SIM 2, turn on the VoLTE calls switch.