Contribution d'origine par : Gido Nijenhuis ,
Is the problem also happening during the call (mic falling away during the call) not? What you can try to do is a restore of your iphone. If the problem still persists there are 2 possible hardware causes: - Microphone is broken - There can be a problem with the microphone on top of the iphone. The big screw underneath the EMI shield can make intermittend contact with the microphone. When it does the microphone mutes. Please check that this screw cannot touch the top microphone and if necesarry isolate these 2 with some electrical tape.