Method and system for use with phone calls originating from...

Method and system for using a frequent shopper card as a phone c

Method for accommodating multiple calling cards during a single

Method for locking to the user's card in a portable radio teleph

Method for processing collect calls

Method for processing collect calls

Method for providing equal access dialing for pre-paid...

Method for providing telecommunications-based services

Method for the acceptance of calling charges for individual...

Method of accepting charges in individual connections and a...

Method of billing a communication session conducted over a...

Method of billing a value-added call

Method of prepaying for consumption of telephone calls

Method of providing message service for pinless limited access t

Method of time-to-talk calculation

Methods and apparatus to manage collect phone calling limits