Hi Matha,
no information yet. Me Test-SIM-Card will travel to the US next week, but the testing person has a Nokia E51 which makes some troubles with the SIM-Toolkit application. I hope it will work at the US either. (My Nokia N80 (Quadband) reboots, If I try to setup a call

So I would suggest to use a maximum silly phone (which understands SIM-Toolkit Applications)
If it works, I'll report it here.