Phone conversations fade in and out

Hello Janebc,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with calls dropping and audio during phone calls. Try the steps here to see if they resolve the issue: If you can't make or receive calls on your iPhone - Apple Support

"ou might not be able to make or receive calls on your iPhone if you have certain settings turned on, if your software isn't up to date, or if there's a problem with your network.

Contact your carrier

When you contact your carrier, make sure that:

• Your account is set up to use your iPhone.
• There aren't any localized service outages.
• Your account doesn't have a billing-related block.
• Your calls don't have errors on the carrier system.

Update your software

1. Check for a carrier settings update.
2. Check for an iOS software update. Some updates might require a Wi-Fi connection.

Check your settings

If you can't make or receive calls on your iPhone, follow these steps, testing after each step.

Check your network setings

1. Reset your network settings. Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This will erase all current saved settings, including Wi-Fi passwords, preferred networks, and VPN settings.
2. Try to make or receive calls in another location.

Check your iPhone settings

1. Turn Airplane Mode on and off. Go to Settings and turn on Airplane Mode, wait five seconds, then turn it off.
2. Check Do Not Disturb. Go to Settings > Focus > Do Not Disturb and make sure it's off. Learn how to use Focus on your iPhone or iPad.
3. Check for any blocked phone numbers. Go to Settings > Phone > Blocked Contacts.
4. Check Call Forwarding. Go to Settings > Phone > Call Forwarding and make sure it's off.
5. Check Silence Unknown Callers. Go to Settings > Phone > Silence Unknown Callers. If the setting is on, a caller must be listed in your Contacts or Recents. Or they must have shared their number in Mail or sent you a message using that number in order for their call to go through. Add their number to Contacts to ensure the phone rings. Calls from some third-party apps might not go through.

To avoid missing calls from a contact, add their number to Contacts to ensure that your phone rings.

Learn more

• Find out what to do if "No Service" or "Searching" appears in the status bar.
• If you still can't make or receive calls, contact Apple Support, then follow the steps to complete your request."

As for the sound issue, try the steps here to see if they resolve the issue with call audio: If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

We hope this helps.

Cheers!