A newly-released hack for jailbroken iPhone 4 units allows for FaceTime calling over 3G networks. The hack, called My3G, has also allowed for a measurement of how much data FaceTime calls use. According to 9 to 5 Mac, a five minute call with “lots of movement” used 14.7 MB of data; this averages out to roughly 2.94MB per minute for FaceTime over 3G, compared to 1.3MB per minute for a 3G voice call over Skype. As for quality, 9 to 5 Mac claims that its editor couldn’t tell the difference between FaceTime over 3G or Wi-Fi, “the quality is that good.” More information on jailbreaking the iPhone 4 and installing the My3G hack can be found here.
iPhone 4 jailbreak hack enables FaceTime over 3G

Charles Starrett
Charles Starrett was a senior editor at iLounge. He's been covering the iPod, iPhone, and iPad since their inception. He has written numerous articles and reviews, and his work has been featured in multiple publications.