In one embodiment, a method includes displaying by a mobile computing device of a first user a notification of an incoming call. The notification identifies a second user associated with a source of the incoming call. The method further includes detecting by the mobile computing device user input provided during the display of the notification of the incoming call. In response to the user input, one or more previous communications between the first and second users is determined by the mobile computing device. The method further includes displaying by the mobile computing device the one or more previous communications.