CAN-US plan: connection in US?

[TP_SP]

I switched to Canada-US plan, supposed to be seemless connection when you cross the border. I chose T-Mobile as a network provider when we crossed the boarder. But it would not work unless I keep Roaming on. Does anyone know if that's supposed to be that way? Will I incur Roaming charges?

[softech]

@TP_SP 

first, you won't get extra charge, and yes, it is normal for people to turn that on to use US networks

although you have roaming plan, the need to turning on roaming on your phone is a device feature, so you do need to turn it on when you are roaming.  The idea to this toggle is a device setting to help people to prevent unexpected roaming charge.  That mobile roaming data toggle is not something PM control, but your device

Enjoy your trip