Sprint and Verizon are repeating earlier statements that unlike AT&T, their subscribers will be able to use FaceTime over cellular without upgrading plans. AT&T is forcing users to move to more expensive shared data plans if they want 3G/4G FaceTime, in spite of similar apps being unrestricted. The difference may be that FaceTime is integrated into iOS, making it more easy to access and thus more likely to consume bandwidth.
