I have SE215 earbuds and the Earphone Accessory Cable for use my iPhone. Everything works but I can't hear myself talk through the earbuds. Is this by design?
Hearing one's voice in the earphones, while making a call, is called sidetone. The level of sidetone is determined by the mobile phone and its related audio circuits, not by the earphones. Shure earphones do not have a circuit that provides sidetone.