Most subscribers currently pay about $30 per month for unlimited data (many still have a 5GB cap), but the carrier may soon turn to tiered plans where people purchase a set amount of monthly megabytes. Naturally, customers under such a model would have to be careful to avoid overage penalties. Interestingly, this comes even though McAdams says the cost of carrying 1MB of data over LTE will be a half to a third cheaper than doing it over 3G.
Verizon isn't the only mobile operator looking to make the switch in pricing schemes, mind you. Both AT&T and Sprint have expressed similar interests.