1. A method for supporting control of distribution of a content item to a user device in a mobile communications network, the method being performed in a provider registry in the mobile communications network and comprising: receiving, from a distribution control gateway in the mobile communications network, a request indicative of a content provider server; and providing a response to the received request to the distribution control gateway, the response indicating a provider authorization of the content provider server for distributing the content item to the one or more user devices.