Enhanced mini-USB connector pinout
HTC ExtUSB pinout
HTC ExtUSB headset pinout for HTC MTeoR, S310, S710, S711, S730, S720, 5800, S620, S621, S630, X7510, X7501, X7500, Touch Cruise P3650, Touch Find, P3300, P3350, Touch P3452, Touch P3450, Touch P3050, Touch Dual P5500, HTC Touch Dual P5310, HTC Touch Dual US, P3470, P3400, P3401, P3400i, TyTN II P4550, TyTN P4500, P4350, HTC P3600, P3600i, P6300, P6500, P4000, P3451, S640, Touch Diamond P3700, Touch Diamond P3700 US, Touch Diamond P3702, Touch Diamond P3100, HTC Touch Pro, Touch Pro CDMA, Touch Viva, Max 4G
HTC Corporation is a Taiwanese consumer electronics company headquartered in Taiwan. Founded in 1997, HTC began as an original design manufacturer and original equipment manufacturer, designing and manufacturing devices such as mobile phones and tablets.