I dumped AT&T because their unlimited data plan was throttled, which limited unlimited data. Years later the FTC agrees. From L.A. Times:
The Federal Trade Commission is suing AT&T Wireless, saying it is seeking millions of dollars in restitution for customers who were promised unlimited data plans by the wireless carrier, only to have their mobile network speeds slowed in a practice known as data throttling
FTC Chairwoman Edith Ramierez:
The company has misled millions of its mobile customers … with so-called unlimited data plans that were in reality not unlimited at all… We think that millions of customers have been affected, and we hope to put money back in their pockets
The FTC’s allegations are baseless and have nothing to do with the substance of our network management program. It’s baffling as to why the FTC would choose to take this action against a company that, like all major wireless providers, manages its network resources to provide the best possible service to all customers, and does it in a way that is fully transparent and consistent with the law and our contracts
Maybe the FTC’s lawsuit has something to do with AT&T changing the definition of unlimited to mean limited.