2. Skip to the next song
Double-click center button: To skip over the filler in your favorite albums, or to reach "Eye of The Tiger" and give your stamina a much needed boost at the tail end of your morning jog, a quick double click will do the trick.
3. Start a song over
Triple-click center button: If you just can't listen to "Uptown Funk" enough times, you can triple click the center button to repeat the funk over, and over, and over again. Don't believe me? Just click (thrice).
5. Rewind
Triple-click and hold (during a song/video)Because sometimes, you just want to experience the good part all over again.
6. Take a picture
Click either volume button (with camera app open)
7. Answer the phone
When getting an incoming call, click the center button once
8. Hang up the phone
 Click the center button once (while on the phone)
9. Hold one call, and switch to another line
Click center button once (while on the phone, and getting another call)
10. Hang up on someone on the other line
Click and hold down on center button for two seconds (while on the the phone, and getting another call)