HTC 3.5mm headset pinout diagram @ pinoutsguide.com
Pinout of HTC HD2 3.5mm headphone jackshould work with HTC HD2, 7 Trophy / Spark, Aria, Arrive, AT&T Desire, Desire (CDMA), Droid Eris, DROID Incredible 2, Droid Incredible ADR6300 , EVO 4G, EVO Shift 4G, Freestyle, Google Nexus One GSM, HD7, Hero ......