When you sign up for a contract or a plan at a carrier, they tell you that you have to pay X amount, but when your bill arrives, it’s more than that. You try to study the bill but it’s full of numbers, codes, and basically it’s too long and confusing to make sense, so you just end up paying whatever is written thinking that maybe you exceeded your minutes or it could be additional taxes. However this is a practice known as cramming, which according to the FCC’s definition refers to the “illegal act of placing unauthorized charges on your wireline, wireless, or bundled services telephone bill.”