Secondary mic location on the iPhone
Please can somebody tell me where the secondary mic is located on the 4S please note i say 4S not 4
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The secondary or upper mic on the iPhone 4S is located at the top of the phone next to the headphone jack. There is a small pinhole you can see from the exterior of the phone. On the interior, this mic is located on the headphone jack flex cable. You can test it by using the speakerphone function. iPhone 4S Headphone Jack Cable Replacement
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