Hey, magenta5430668! Congrats on your upcoming trip, and thanks for asking! Sorry to say at this point our only Tourist Plan is for domestic US use.
Our T-Mobile ONE Prepaid plan does offer North America coverage, and you can add this coverage to a Simply Prepaid plan for $5 -- you can take a look at a comparison here: https://prepaid.t-mobile.com/marketing-module/compare_plans.pdf -- but it's worth mentioning that we're still a US based company and both activation and the majority of usage must be in the US. Are you a current customer? What plan do you have right now?