@dust2dust I think I will try the US Roaming add-on and hope for the best. I gather the iPhone 12 will be looking for 4G and as we are travelling from here to Georgia my guess is that most of that area will be getting 4G coverage. T Mobile 4G covera...
I am reading how roaming in US requires 2G for voice services but how can I change my iPhone 12 cellular settings to 2G? The only options are LTE and 4G.