Method and system with user identifiers that indicate session type

A wireless communication device comprising:

• a user interface for receiving an instruction to establish a requested communication session over a packet-switched network on behalf of a user, said requested communication session having a requested session type;
• data storage storing a plurality of user identifiers associated with said user;
• selection logic for selecting one of said plurality of user identifiers, based at least in part on said requested session type, wherein said plurality of user identifiers associated with said user includes a first user identifier that indicates a first session type and a second user identifier that indicates a second session type, and wherein said selection logic selects said first user identifier if said requested session type is said first session type and selects said second user identifier if said requested session type is said second session type;
• and
• at least one application for establishing said requested communication session of said requested session type, wherein said at least one application uses said selected user identifier to identify said user for said requested communication session, and wherein said at least one application includes a first application for establishing communication sessions of said first session type and a second application for establishing communication sessions of said second session type.

A method of obtaining session type information, said method comprising:

• establishing a communication session over a packet-switched network on behalf of a user, said communication session having a session type;
• obtaining a user identifier that identifies said user for said communication session;
• determining said session type from said user identifier;
• selecting, based at least in part on said session type determined from said user identifier, one of a plurality of billing formulas;
• and
• using said selected billing formula to calculate a charge to said user for said communication session.