Predictability is the key to successful wireless data pricing

Unlimited data plans are quickly becoming a thing of the past for both fixed and mobile operators.  …Most experts believe that those types of data packages are just too expensive to provide because operators need to balance the economics of their physical infrastructure with the prices they charge their customers. And data usage is just increasing too quickly for them to be able to make the unlimited price plans economically feasible and technically possible. (Fierce Wireless)