Excuse me for bringing back this topic, but I have a similar question regarding this topic. We're visiting California next week as an European tourist. I'm willing to buy the 30 days unlimited web prepaid deal from t mobile, however I saw that it is for 'US residents only'.
Do they check this? Do you have to provide a passport or something?
We only need Internet for 3 weeks so 30 days is sufficient, it's mainly for navigation purpose on my HTC Sensation.
Another question, is the sim a standard one or is it a micro sim?
Hope you can give us the answer! Can't wait for our visit!
Jasper from the Netherlands.