Problem with microphone.

oleksii179 Said:

"Problem with microphone.: all of my microphones are working good, but if I am talking on the speakerphone(loud sound) and at that moment someone is talking, then I cannot be heard by that one, who is talking, but if he is not speaking, then he is able to hear me.[...]"

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Troubleshooting iPhone Sound:

Refer to these Two Links:

• Volume Output: If you Can't Hear a Person on a Call or Voicemail or if the Sound isn't Clear on your iPhone - Apple Support
• Volume Input: if your Microphone isn’t Working or People Can’t Hear you While you’re on a Call - Apple Support

A Few Other Links that May Help:

• If you Hear No Sound or Distorted Sound from your iPhone, iPad, or iPod touch Speaker - Apple Support

• If the Microphones on your iPhone aren't Working - Apple Support

• Control Audio Playback on AirPods with iPhone - Apple Support

• Adjust Audio and Visual Settings on iPhone - Apple Support

• Adjust the Volume on iPhone - Apple Support

oleksii179 Said:

"Problem with microphone.: all of my microphones are working good, but if I am talking on the speakerphone(loud sound) and at that moment someone is talking, then I cannot be heard by that one, who is talking, but if he is not speaking, then he is able to hear me.[...]"

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Volume Input: if your Microphone isn’t Working or People Can’t Hear you While you’re on a Call - Apple Support

Us other users here within the Apple Community forum are answering your question, it just may not be the way you expected but it is still sound advice. You may not see it as a typical issue, but it is still normal to get and do the basic troubleshooting Apple recommends and provides. Additionally, it gives you direct details on how to contact Apple for further assistance if their steps do not help.

Checkout If the microphones on your iPhone aren't working - Apple Support