Calling party pays system bypass

Cell phone minute usage calculation and display

Cellular adjunct to a public wired network

Cellular phone managing method, managing apparatus, record...

Cellular phone system wherein the air time use is predetermined

Cellular system having programmable subscription capabilities

Cellular telephone device having a non-contact type...

Cellular telephone management system

Cellular telephone system having mobile charging region and area

Cellular telephone-based transaction processing

Cellular telephone-based transaction processing

Cellular-telephone central call-processing system utilizing obje

Channel request and contention resolution apparatus and method

Charge meter system and method of compiling utilization fees

Charge-all mode for calls in telecommunication network

Charging control of telecommunication network subscriber

Charging criteria for a call in a cellular mobile network

Charging efficiency

Charging efficiency

Charging for an IP based communication system