T-mobile International Ag

T-mobile International Ag & Co Kg

Peter Jessen

Maik Kirsch

Tomas Lebl

Holger Weigang

Martin SÖHN

The invention relates to a method for blocking roaming steering mechanisms. According to said method, a foreign cellular device (), e.g. a cellular telephone, is registered with nationally visited radio network () when the foreign () and the national cellular network operator have concluded a roaming agreement on mutually debiting cellular services. The invention is characterized in that an anti-roaming steering server () installed in the nationally visited cellular network () identifies manipulated error messages () and selectively manipulates the registration process () of foreign mobile users by adequately influencing signaling processes.

Method for blocking roaming-steering mechanisms

A method for informing a subscriber of a mobile telephony network about incoming calls while the mobile telephone of the subscriber is switched off or is not connected to the mobile telephony network. The notification takes place via the mobile telephone of the subscriber as soon as the mobile telephone has re-registered itself in the mobile radio network, and the message including at least the call number of the missed caller. In the event of a calling line identification restriction (CLIR) from the caller, a message is automatically produced and sent to the caller, by which means the caller is prompted, by a dialogue, to temporarily release the call number transmission for the call, such that the call number of the caller can be communicated to the subscriber.

Growing community of inventors

Bonn, Germany

Peter Jessen