Easy Answer : Shake and motion

1. Proximity Sensor: Answering a call without touch like Air call accept

2. Acceleration sensor, shake the phone: Receiving a call

3. Shake Hangup: Hangup acceleration sensor

4. Dial-up connection, the end of vibration

5. Upside down in silent mode

6. Upside receiving rejection

7. Call volume to maximize

8. Turn on the speakerphone: Proximity Sensor Turn on the speakerphone automatically after

9. Speakerphone initial volume adjustment: Adjust the volume to 1/2 the initial

10. Speakerphone automatically switched depending on the distance of the ears, speakerphone auto on / off feature

If screen is turned off (dark state), shaking breaking currency notes upside down in the work does not (battery save)