iphone x receiver problem

1. Check if you have accidentally muted or lowered the volume for calls. Also, check if the "Do Not Disturb" mode is enabled, which could be silencing calls.
2. Dust, lint, or debris could be blocking the receiver grille. Use a small, soft brush to gently clean the area and see if it improves the sound quality.
3. Certain third-party apps could be causing conflicts that affect the receiver's functionality. Try restarting your iPhone in Safe Mode and see if the issue persists.
4. Sometimes, network issues or problems with your carrier could lead to call quality problems. Test the receiver with different phone numbers and carriers to rule this out.
5. The receiver and the microphone are closely related components. If the microphone isn't working properly, it could impact call quality. Test the microphone by recording voice memos to check its functionality.

Please explain what you mean by that.