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Hello I have problem with my mic The other side can’t hear me on speaker mode, when I speak normally he can hear me fine without any problem Somebody can help me find the problem? Thanks

Have you opened the iPhone itself and checked the cables? You may have to replace the speaker part itself. As a IT tech, I have many people coming in with the same problems mostly with the 6 and 6 plus. I replaced the speaker piece itself and then the phone started working again.