Iphone4 built in mic does not mute when using apple headphones
When I plug in my apple headphones into my iphone4 (which I have to use because Bluetooth headphones give a terrible signal on the iphone4) the inbuilt microphone on the iPhone handset does not "mute". This means I effectively end up with two active microphones (one built into the phone and one on the headset.. This results is feedback/unacceptable background interference. Does anyone have any ideas on how this can be fixed as it renders the phone useless unless you are able to hold it to your ear all day long.
Iphone4, iOS 4