Does this mean that when 1 phone goes past 15GB, it is necessary to opt-out of the cap to return to normal speeds?
If not (and it doesn't make sense if opting out of the cap is somehow possible), is there ever any case where someone would _not_ want to go back to the normal speed as they cross the 15GB on the way to passing the cap?
Is the intention just to throw in a minor speed bump requiring the affected 1% of users to contact support every month (leaving the few that are ignorant throttled)?