A method of initiating a communication includes detecting, at a mobile device, that a button is being pressed. The method also includes generating sensor information associated with a finger in response to a determination that the finger is pressing the button. The sensor information indicates at least a duration that the finger is pressing the button. The method further includes initiating the communication with a particular contact of a plurality of contacts using contact information for the particular contact. The particular contact is selected based on at least the duration.