Allyson,
The model Hank Nothhaft showed me in Cannes, France, was tri-band. That is, it works in the European and American (and anywhere else that GSM works) frequency bands.

Specifically, tri-band is 900 MHz, plus 1800 MHz (the two European frequencies) and 1900 MHz (the US frequency). In other words, the thing can work, and the one Hank demonstrated in France was working.

What I need to find out, is whether there’s any “trick” to switching from one frequency to another. Most phones that are tri-band automatically detect whatever frequency is available, and switch to it. However, while that’s usual, it’s not inevitable, and I’ve asked Danger for clarification of “how do you switch frequencies, if you have to?”

What I can’t tell you, is whether your ID card - the SIM or Subscriber Identity Module - in the phone will be set up to “roam” in Europe – that’s something only T-Mobile can arrange. If you ask for roaming, they should just arrange it.

However beware! – roaming costs can be huge. Ask T-Mobile what the data rates will be, and the call rates. Data, especially, can be charged at obscene premium costs!

It’s worth considering getting a European “SIM-only” contract for that month. Again, I don’t know for sure exactly whether this is a problem for contacting Danger’s server’s in the US, but I believe it isn’t. Hank certainly was accessing those servers when I met him in France. I believe it’s just an Internet connection, and therefore doesn’t care where the host computer is located. I could be wrong, of course.