My ear phone receiver is not working after update to 16.5.1

Hello fasi241,

For difficulties with your receiver, you'll want to take the steps below:

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

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

3. If necessary, clean the speaker or receiver opening with a small, soft-bristled brush. Make sure that 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 don't hear any sound, or if your speaker button on the Ringer and Alerts slider is dimmed, your speaker might need service.

5. If you hear sound, try making a call with your iPhone and turn on speakerphone. On iPad or iPod touch, make a FaceTime call. If you still can't hear, or hear static or crackling, then your network or reception could be the issue. Try to call again later, or from a different location.

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 behavior 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.