What you can do with presence

• Show others your availability, mood, preferred method of communication, even your location
• Show different availability to different groups of people
• You are always in control of what information is displayed and to whom
• Know where a person is and what they're doing before you call
• Make your message personal: "Bored! Call me!" "In a meeting - SMS only please" or even "On holiday! Contact my backup Liza B on +2441234."
• Know the capabilities of your friends' phones (can they receive MMS?)
• Companies can have presence too: a restaurant can display the lunch menu; flight carriers the best last-minute specials...
• Presence may be able to work with other phone applications - for instance, when a meeting entered in your calendar begins, your phone could automatically switch profile and presence info
• Presence should work even between subscribers to different operators, or between handsets made by different manufacturers