Yes you data will work in USA and Canada up to 50GB without any extra charge, but once you use all of your data(50 GB), you will not be able to use data anymore till your next renewal cycle.
Yes. Your data will 100% work... as long as your phone has VoLTE enabled. You may have to go into your settings and turn off automatic and pick T Mobile and also turn on data roaming then reboot. Then you should be good to go.
