Post originale di: Cristian Buiucli ,
The microphone for calls would be located on the bottom left loudspeaker grill. The 2nd microphone for siri is on the proximity sensor flex cable, located right under your ear speaker on top. Finally the 3rd microphone is behind the device near your camera, it's a small tiny hole, used for picking up sounds when you're recording a video. I hope this helped.