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Method and system for messaging across cellular networks and a public data network

  • US 7,324,826 B2
  • Filed: 03/08/2004
  • Issued: 01/29/2008
  • Est. Priority Date: 03/06/2000
  • Status: Expired due to Term
First Claim
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1. A method of enabling a user of a cellular communications device to communicate with other users using instant messages, the method comprising:

  • sending a sign on function from the cellular communications device to initiate an instant message session, the sign on function being manually initiated by a user of the cellular communications device, the manual initiation is not associated with a power-on sequence;

    enabling the user of a cellular communications device to receive after execution of the sign on function, at the cellular communications device, availability information for a user-defined group of other users, wherein the other users within the user-defined group are included in an instant message name list maintained for the user and the availability information includes an indication of an availability of the other users to communicate using instant messages;

    receiving the availability information at the cellular communications device; and

    displaying the availability information in a user interface on the cellular communications device.

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