The FCC just levied the largest fine in the agency’s history against AT&T Mobility. The mobile service provider received a $100 million fine for offering unlimited data plans to customers, but then severely limiting the actual speeds users could access when they reached a certain point in their usage. AT&T is fighting the fines, claiming in a statement, “The FCC has specifically identified this practice as a legitimate and reasonable way to manage network resources for the benefit of all customers, and has known for years that all of the major carriers use it.” However, as the AP notes, instead of only limiting speeds during times of heavy network usage like other carriers, AT&T slows subscribers for the duration of their billing period, even if the network was not congested. An FCC official explained, “Unlimited means unlimited,” and said that AT&T intentional avoided transparency with its customers …