Originally Posted by
FlybyKnite
Have to be careful though. With AT&T, if it goes to voicemail it will be charged for as an international call; because, the call was "completed" [by going to voicemail] while you were overseas. It would also behoove you to learn how to retrieve your voicemail by using Skype to avoid additional charges.
I have never noticed this on my bill. If you turn off data you will be unable to retrieve voicemail the normal way on your iPhone. You need to call your number and enter your pin.