My bluetooth device connects OK but can not select when using phone
I have several bluetooth devices that connect to my Iphone but when I use the phone, I can not use the bluetooth. In other words. when on a call, pressing the speaker icon only switches between speaker and phone, it will not give the option to use bluetooth. It worked originally but stopprd a day ago. Is there a setting or conflict?
iPhone 4S, iOS 5.1.1