Abstract: Methods and systems enable mobile devices to receive communications and inform users about received communications by vibrating based on a vibration pattern. The mobile device may inform a user about the type of communication, the identity of the communicator and the content of a message by generating vibrations according to preset vibration patterns. Vibration patterns may be implemented according to Morse code. The mobile device may also receive commands and instructions from the user in the form of accelerations (e.g., tapping or patting) of the mobile device. The mobile device may translate the accelerations into acceleration pattern data which may be compared to stored patterns or templates to determine a corresponding command. The mobile device may execute the command and verify the execution.