Headsets, Headphones, Handsfree - pinouts of mobile phones and other equipment  > HTC pinouts
Pin Signal Description
1 (Tip) Left ear  White
2 (Ring 1) Right ear  Red
3 (Ring 2) Mic/Switch 1 (Answer Call)  Blue
4 (Sleeve) Ground  Copper
not drawn (Outer Sleeve Ring) Switch 2 (End Call)   
4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector
at the headset cable (with an addition sleve)
According to 2 reports in our database (2 positive and 0 negative) this pinout should be correct.

Is this pinout
O2 Xda II , QTEK 2020, SPV M1000, Dopod 696 (all Himalaya) headphone / headset / handsfree visual pinout:
O2 Xda II , QTEK 2020, SPV M1000, Dopod 696 (all Himalaya)  headphone / headset / handsfree diagram
click to enlarge
Source(s) of this and additional information: wiki.xda-developers.com
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