Cellular fraud prevention using selective roaming
Cellular mobile radio network and method for operating such...
Cellular phone
Cellular phone capable of detecting counterfeit currency or...
Cellular phone subsidy lock
Cellular phone unit, control system of vehicle-mounted...
Cellular radiotelephone system with remotely programmed...
Cellular telephone anti-fraud system
Cellular telephone anti-fraud system
Cellular telephone authentication system using a digital certifi
Cellular telephone device and transmitter to cellular telephone
Cellular telephone fraud prevention system using RF signature an
Cellular telephone network support of international mobile stati
Cellular telephone set, dial lock releasing method used in...
Cellular type mobile communication system that provides...
Checking the access right of a subscriber equipment
Checking the access right of a subscriber equipment
Checking the identification number of a mobile subscriber
Ciphering between a CDMA network and a GSM network
Circuit for indicating loss of portable telephone and control me