Huawei p20 pro is prevented from using the AT and T network in the USA

[harness68]

As the Huawei p20 pro is prevented from using the AT and T network in the USA how can I force my phone to use T mobile

[SuziM]

Hey there! You should be able to go into your phone's settings and manually select T-Mobile 😊 Hope that helps!

I've pasted some steps here: 

1. Press Settings.
2. Press Wireless & networks.
3. Press Mobile network.
4. Press Carrier.
5. If you want to select a network manually, press the indicator next to "Choose automatically" to turn off the function.
6. Press OK and your phone will search for networks.
7. Press the required network.

[sc1999]

Considering what the US government thinks of Huawei I'm surprised they let you in the country. Sorry but could not resist.