Prepay telecommunications system with unregistered roaming call

Prepayment method utilizing credit information stored in mobile

Process for generating an address directory

Providing services in communications networks

Provisioning communication services in a communications...

Proximity-based mobile telephone billing intervention

Push-to-talk wireless communication for prepaid mobile...

Radio mobile terminal provided with an additional reader of...

Radio selection call receiver capable of increasing receiving ra

Radio telephone apparatus capable of detecting a drop of...

Real time charging of delivery and receipt of short message...

Real-time interconnect billing system and method of use

Recyclable cellular telephone and method and apparatus for suppo

Reducing calling costs for wireless phones using multiple...

Remote access management systems

Replenishment of pre-paid wireless telephone accounts using...

Replenishment of prepaid accounts during multimedia sessions

Retrieving a bill via a coded surface

Retrieving a program state via a coded surface

Retrieving a program via a coded surface