FCC plans to fine AT&T $100 million over 'unlimited' data plans

The third paragraph misquoted the speeds promised to users by AT&T. The correct speeds are 5Mbps to 12Mbps.

The story has been corrected on the wire and the second paragraph changed to read as follows:

Data speeds were significantly slowed to 512kbps from the advertised 5Mbps to 12Mbps under something AT&T called its maximum bit rate policy. That very name is clearly at odds with an unlimited plan, a senior FCC official told reporters on a conference call.

Martyn Williams covers mobile telecoms, Silicon Valley and general technology breaking news for The IDG News Service. Follow Martyn on Twitter at @martyn_williams. Martyn's e-mail address is martyn_williams@idg.com