DC how do you avoid incoming calls without being charged? Do you have call forwarding or voice mail turned off. I found out the hard way on Intl' data use. I'm always used my pearl 8120 with no problem and then got a unlocked iphone to try in the same way. Long story short got hit with a $2000.00 + bill :( even thu I did not intensionally use the Internet. There must be apps that run in the background. I'm still fighting with T-Mo over this. Be very careful and check your bill every other day when traveling.