On phone call people can't hear me clearly, I think this happened after update.

If you have a hearing or sound issue on your device then please try some of these processes to set it right

1. If you have a distorted sound issue on your iPhone --> If you hear no sound or distorted sound from your iPhone, iPad
2. If you are not able to hear the other person, click this...>If you can't hear a person on a call or voicemail or if the sound isn't ...
3. If you only hear through speakerphone mode --> If your iPhone is stuck in headphone mode - Apple Support
4. If the other person is not able to listen to you then please click this to identify the issue --> If the microphones on your iPhone, iPad, and iPod touch aren't ...

If the above options do not mitigate the issues then Contact your carrier and then Contact Apple Support

mehedi229 Said:

"On phone call people can't hear me clearly, I think this happened after update. Hi, I bought this phone 3 days ago, I was able to make calls without any issues. I think this began after updating the phone, people are not able to hear me on call but they are able to hear me.[...]"

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Troubleshooting iPhone Microphone:

A Few 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

• Volume Output: If you Can't Hear a Person on a Call or Voicemail or if the Sound isn't Clear on your iPhone

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