I would simply like to know from Verizon whether I am using data from my 4G / month allotment when I make a call using Face Time. I understand one has to be connected to Wi-Fi (on both ends I presume) for this feature to work. If I'm using my WiFi service for which I am paying separately, it doesn't make sense that I would also be using Verizon data . I have searched all over the Verizon site and the community forums and the FAQs but have not found a definitve answer. So here it is again: I have share everything unlimited call minutes and unlimted text with 4G data. I have an iPhone 4. When I call my sister on her iPhone 4S from my iPhone4 and we use Face Time am I , or is she, or are we both using up data in addition to talk minutes?