1. A system comprising: at least one processor; and one or more computer-readable storage media including instructions stored thereon that, responsive to execution by the at least one processor, cause the system perform operations including: detecting, at an infrastructure component of a wireless cellular network, initiation of a call from a calling device over the wireless cellular network; determining that the calling device is associated with a subscription to a communication service that is separate from the wireless cellular network; and notifying the communication service of the call to cause the call to be processed according to one or more service policies of the communication service.