Even for the 2gb data plan they will be expecting a certain level of breakage (use under 2gb, which is charged but never used). The same is true of minute bund

Even for the 2gb data plan they will be expecting a certain level of breakage (use under 2gb, which is charged but never used). The same is true of minute bundles. Users which go a lot over (and pay per minute) are fine, users which are a lot under (and still pay for the bundle) are fine. Users who are averaging use of 80-120% will probably be costing the provider more than they pay.