Casti originale htc compatibile doar cu urmatoarele modele
HTC Headset Stereo EMC220 black for HTC Advantage X7510, HTC TyTN P4500, HTC TyTN II P4550, HTC Touch Viva, HTC Touch Pro2, HTC Touch Pro P4600, HTC Touch P3450, HTC Touch Dual P5500, HTC Touch Diamond2, HTC Touch Diamond P3700, HTC Touch Cruise P3650, HTC Touch Cruise 09, HTC Touch 3G, HTC Snap S520
HTC Headset Stereo EMC220 black for HTC Advantage X7510, HTC TyTN P4500, HTC TyTN II P4550, HTC Touch Viva, HTC Touch Pro2, HTC Touch Pro P4600, HTC Touch P3450, HTC Touch Dual P5500, HTC Touch Diamon