IPHONE 11 PRO MAX-problem WITH sound on incoming call

Hi nikolay189,

Welcome to Apple Support Communities. We suggest updating the iOS version (to 16.3) to help with this incoming ringtone issue. Follow the steps per the Apple Support article: Update your iPhone or iPad - Apple Support

Update your iPhone or iPad wirelessly

1. Back up your device using iCloud or your computer.

2. Plug your device into power and connect to the internet with Wi-Fi.

3. Go to Settings > General, then tap Software Update.

4. If you see more than one software update option available, choose the one that you want to install.

5. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.

If updating does not resolve this for you, the next step will be to get in touch with Apple Support:

Get Support

We hope this helps you.