A system that integrates Global System for Mobile Communications (GSM) and Wireless Fidelity (WiFi) wireless local area network (WLAN) services is provided. The system couples among components of a communications service provider and a provider of WiFi services to provide integrated cellular communications and wireless fidelity network services to users of mobile devices. The system monitors communications between the service provider and the mobile devices and automatically gathers identification information of the mobile devices. Upon authentication of the mobile devices via an exchange of information among the service provider infrastructures and the mobile devices, the system controls access of the mobile communication devices to WiFi services via the service provider infrastructure using the identification information.