I cant hear other person when I call out

Hello Monalaleona,

For audio difficulties with your phone calls, you'll want to take the steps below:

1. Remove all screen protectors, films or cases from your device. 

2. Check the opening of the speaker to see if it's blocked or dirty. On iPhone only, make sure the receiver isn't blocked or dirty. 

3. If necessary, clean the speaker or receiver opening with a small, soft-bristled brush. Make sure the brush is clean and dry.

4. Go to Settings > Sounds (or Settings > Sounds & Haptics), and drag the Ringer and Alerts slider back and forth a few times. If you can't hear any sound, or if your speaker button on the Ringer and Alerts slider is dimmed, your speaker may need to be serviced.

You can also find those steps in this resource: If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

Should that still persist, you'll want to reach out to Apple Support: Apple Support They'll be in the best position to look into this further.

Take care.