iPhone 13 speaker cutting in and out

Greetings AAA2121,

Ensuring the audio is working as expected is important and the steps listed below are specific to resolving audio related issues with the speakers. You can also find these steps outlined in the following article. While the article references a different issue, we can assure you these steps are applicable.

1. "If your device has a Ring/Silent switch, move the switch forward—toward the device's display—so that orange isn't showing. If you're using an iPad, you can also swipe down from the top-right corner to open Control Center and make sure that Silent Mode is off. 
2. Open Settings > Focus > Do Not Disturb and make sure that Do Not Disturb is off."

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."

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker

If you continue to have issues after completing those steps, reaching out to Apple or visiting a location is the right next step. You can find their contact details and the locations nearest to you via the links below.

Contact - Official Apple Support

Find Locations - Apple

Have a wonderful day!