When AT&T announced that it was going to block FaceTime, Apple’s video chat application, we pointed out that this was a violation of the FCC’s Open Internet rules, and that AT&T’s attempted defenses fell short. We meant it. Today, with our colleagues at Free Press and the New America Foundation’s Open Technology Institute, we notified AT&T that, if it doesn’t reverse course, we plan to file a formal complaint with the FCC.