The cost of using the mobile network for data services. The two main charging models are: pay-as- you-use, which is effectively metered billing because the charges increase in proportion to the amount of data consumed by the user; the second method is charging at pre-set rates (over a monthly usage period) for pre-determined amounts of data that can be consumed. These charges become significant in the distribution of rich media content that drives large amounts of data across the networks.
