Question iPhone 7 Plus Mic Problem

sysrq54

Honorable
Mar 26, 2016
7
0
10,510
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My microphone works in WhatsApp call but on a normal phone call people barely hear me? The strange thing is that when I make a normal phone call with the headset, there is no problem. Mics work, but not during phone calls. I've tried everything, sim card changing, dfu clean install. Where exactly is the problem?
 

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