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Utilizing contextual information for mobile communication

Mobile phones enable us to be reachable by phone calls anywhere and anytime. However, it is not always appropriate to answer a phone call. Even a ringing or vibrating phone can be inappropriate in some situations. The information required to assess if a call is appropriate is split between the caller and the callee. Only the caller knows the importance of the call and only the callee knows her context. Sharing parts of this context with the potential caller would enable the caller to make a better decision. Based on previous work we conducted a survey to learn about the contextual information that users believe to be important for this decision. We derive context information that users will to share and consider relevant and helpful. Further, we present a mobile application that augments users' address book with contextual information that we aim to study in the large.