I've used an ATT MediaNet plan on my iPhone for a loooong time and it's worked without a hitch. But now I can't get a data connection, and I'm trying to figure out if this is just a personal problem. Because I went to Europe, installed Ultrasn02, and used another SIM card for awhile without a problem, but now that I'm back in the US, I can't get it to work. Anybody else having problems? Or should I just do a restore and hope for the best?