The Federal Communications Commission has released the findings of an agency survey on the consumer mobile experience that found 30 million Americans have experienced "bill shock," a sudden increase in their monthly bill that is not caused by a change in their service plan. In addition, the survey found nearly half of cell phone users who have plans with early termination fees (ETFs) and almost two-thirds of home broadband users with ETFs don't know the amount of the fees they are responsible for.