The HTC One X using a Bluetooth headset as a remote shutter (the Bluetooth Earphones As the Remote Shutter for the HTC One, X)

The HTC One X has a good camera, but it lacks a physical shutter button. And this makes it difficult to take pictures in some occasions, such as self portraits. But if you have Bluetooth earphone or handsfree, you can use it as remote shutter for the camera. Just pair earphone with the phone and press specific button set, no root or unlock needed.

(This demo was using international version of HTC One X. The results may differ in other regions.)

http://www.eprice.com.tw/mobile/talk/4542/4768866/