got a bit of an annoying issue with my new space grey 64gb. after switching between apps such as facebook and messenger etc and using it with the screen on for a while, if im on the home screen and swipe up to get the toolbar open, my speaker makes an audible popping noise, sounds very much like a mobile phone camera focusing. unfortunately apple said they cant find any issue with the phone so im stuck with it. (not too bothered as it doesnt happen every time)
just wondering if anyone else has had a similar issue?