In one aspect, a wireless communications device includes a processing unit; memory communicatively coupled to the processing unit; at least one antenna; a cellular receiver communicatively coupled to the processing unit and the at least one antenna to perform wireless communications using a first protocol; and an identification device communicatively coupled to the processing unit and the at least one antenna to perform wireless communications by modulating a received signal using a second protocol different than the first protocol. The wireless communications device may further include a location-determining system communicatively coupled to the processing unit to determine a current location of the wireless communications device using a global positioning system (GPS), to allow the processing unit to perform a control operation based on the current location of the wireless communications device.