A dynamic mobile service control architecture for policy-based control and charging of a mobile data network is described. Reference point links logically connecting a subscription profile repository and a service gateway allows the service gateway to receive information about a subscription to a service by a subscriber and forward this subscription information to an external application function that is providing the service to the subscriber through the mobile data network. Reference point links logically connecting a policy server with the service gateway allows the service gateway to receive and enforce policy rules on service data flows passing through the service gateway.