No sound on bluetooth headset with calls.
Bluetooth headset has good connections to my 5s. I can listen to music on the bluetooth headset through the iPhone, but unable to use it for calls. I cannot hear the other side. They can't hear me either. Tried it with two different Bluetooth devices, a Jawbone and a Plantronics. Exactly same problem. Can listen to music, etc on the iPhone through the headsets, but I cannot hear calls nor can they hear me. For example,when I call my voicemail I can see from "audio" that the headset is connected to the call. But when the iPhone calls, I hear a quick succession of three beeps, two low and one higher one. Then nothing. With incoming calls, I hear the ring through the headset, but when I answer, nothing.
No problem with hearing through the iPhone or via speaker,only with the bluetooth headsets.
iPhone 5s, iOS 9.3.1, null