[Triband81]

Originally Posted by Motel75

I would expect it to work on would be T-Mobile's own, and not one belonging to its Spanish arch-enemy.

The FAQ now seems to imply it is an option: http://www.t-mobile.com/templates/faq.aspx...e#howtorecharge

That may be true but you have to keep in mind that not too many T-Mobile To Go users are very likely to primarily travel to Germany or to the UK. T-Mobile USA must be wagering that T-Mobile To Go are more interested in North American roaming and that if anything a number of To Go subscribers have family or connections to Mexico. I wouldn't be surprised if at first the To Go roaming will be expanded to Canada and Mexico with Europe to follow later.