Embodiments disclosed herein provide systems and methods that allow a mobile device to fully access unified communication services of a carrier. In a particular embodiment, a control system receives a call for a unified communications service and determines whether the mobile device is associated with the unified communication service. If the mobile device is not associated with the unified communication service, then the call is connected to a unified communication system to provide access to a first portion of the unified communication service. If the call is associated with the services, then the call is assigned a virtual number and connected to an intermediate communication system, which determines at least a second portion of the unified communication service associated with the virtual number. The call is then connected to the unified communication system to provide access to the first and second portions of the unified communication service.