Some rumor said Apple may be waiting on an improved iPhone before turning on FaceTime. Like iOS 5, the next iPhone is expected to ship in the fall. While it's unlikely to support LTE, it may support HSPA+ speeds up to 21Mbps, which would make 3G-level video calling more practical. Streaming video tends to degrade over regular HSPA, which has real-world bandwidth closer to between 1 and 3Mbps.