1. A method comprising: receiving at a server a first usage measure from a communication device, the server being remote from the communications device, the first usage measure specifying the communications device's use of one or more network services over an access network and corresponding to a first data usage classification; receiving at the server a second usage measure from a network element, the second usage measure specifying the communications device's use of the one or more network services over the access network and corresponding to a second data usage classification, the second data usage classification being different than the first data usage classification; and synchronizing the first and second usage measures, the synchronization including adjusting at least one of the first usage measure and the second usage measure to account for a difference between the first data usage classification and the second data usage classification.