Multiple home zone areas within a mobile telecommunications netw

Multiple service provider prepaid wireless service card

Multiple-level home area pricing for cellular mobile telephones

Network based archiving of user-specific information in a...

Network based tariff acquisition system for roaming mobile subsc

Network support for credit card notification

Network support for credit card notification

Network support for minute usage alerting

Network support for mobile service plan minute exchange by...

Nonreusable cellular telephone

Nonreusable cellular telephone

Nonreusable cellular telephone and method of making cellular...

On demand real time telephone billing equipment

Online churn reduction and loyalty system

Online churn reduction and loyalty system

Operations method for providing wireless communication services

Operations method for providing wireless communication...

Operations method of providing wireless communication...

Originating a billed transaction for an origin telephony device

Package billing for micro-transactions