A method of a first mobile computing device includes storing a wireless communication address of a second mobile computing device, determining that the first mobile computing device has left a sleep state while in a closed condition, and automatically wirelessly transmitting a notification to the second mobile computing device in response to determining that the first mobile computing device has left the sleep state while in a closed condition. A method of a second mobile computing device includes receiving a wireless notification from a first mobile computing device indicating that the first mobile computing device has left a sleep state while in a closed condition, and providing an alert to a user of the second mobile computing device in response to receiving the wireless notification.