How many microphones does the iPhone 6s have? - Quora
Apple iPhone 6s / 6s Plus - Device Layout - AT&T
Where Is My iPhone's Microphone? | Appledystopia
Amazon.com: Johncase OEM Charging Port Dock Connector Flex Cable w/ Microphone + Headphone Audio Jack Port Ribbon Replacement Part Compatible for iPhone 6s All Carriers (White) : Electronics