sticking to face time.
Over 3G, even between phones on HSPA towers, the video was not just laggy, its reaaaaaly laggy and of significantly lower resolution. Even FaceTime over MiFi did better.
If anything, this is a good proof of why Apple chose NOT to include 3G video calling.... Its just not worth it. After a less than 4 minute call, I was having a hard time watching the screen.
btw, it's not just AT&T either, we tried it over Sprint and Verizon as well (we have numerous miFi like things around here). It was the worst by far over Verizon, video calls dropped after 15-30 seconds (no surprise, they have the slowest data speed of any provider here).