A method for native call and VoIP call integration is disclosed, comprising: receiving, at a switch in a mobile operator network, an incoming call for a mobile device; querying a convergence gateway from the soft switch via an application programming interface (API) at the convergence gateway to determine whether the mobile device is currently engaged in a voice over IP (VoIP) call using a VoIP calling software application on the mobile device; delivering the incoming call via the soft switch over IP as a VoIP call to the VoIP calling software application on the mobile device.