An unlimited data plan should be exactly that–unlimited. Instead cell phone companies often use the word unlimited to sell plans but don’t really mean it. For example, AT&T has been throttling down the speed of phones, even if not using very much data compared to limited plans. The phones still work, but they cannot be used to stream video, and web browsing becomes very slow.
Matt Spaccarelli sued AT&T, complaining that his phone was throttled after using only 1.5 gigabytes to 2 gigabytes of data during a billing cycle. In contrast, people purchasing a tiered plan for the same price Spaccarelli paid at $30 would get 3 gigabytes of data. Spaccarelli was awarded $850. Unfortunately AT&T’s small print prevents class action suits so each customer in his situation will have to sue individually.