Abstract: A data meter client on a mobile station meters data usage by one or more applications and communicates with a network element to reconcile the metered data usage with the current data usage as measured in the network. The client determines whether the metered data usage may be out-of-sync. When it is determined that the locally metered amount may be out-of-sync, the client sends to the network element a query requesting an estimate data current usage, as measured in the network, receives a response containing the current estimate data usage, and reconciles data usage information in its local database. The client updates information displayed in a graphical user interface for a user of the mobile station. The network element can send a notification to the mobile station containing the current data usage so that the client can update and display the current data usage measured in the network.