10-31-2023 10:29 PM
10-31-2023 10:33 PM
for US roaming data, the 15 days counter starts at the time the purchase is made. So, wait till closer to the time you go to US and don't buy too early
And US roaming usually works quiet well, just that people not understand what to do.
A reminder, when you are in US, make sure you try to connect to T-Mobile and AT&T network. If it does not connect automatically, then change the Network connection to manual and select try T-Mobile and AT&T manuall.
If you roaming purchase includes data, make sure you enable Roaming Mobile Data on your phone. Change network mode to 4G/LTE
If your roaming purchase includes voice, enable VoLTE on your device and you might be able to use VoLTE for voice. But if not, your phone should change to 2G network on T-Mobile ONLY and test voice calls
10-31-2023 10:32 PM
the 15 Day US Roaming add-ons take effect as soon as you successfully buy them. There's no risk to your regular account. Make double certain you're looking at the 15 Day US Roaming add-on before you buy.