1

Click your profile picture and then go to Settings > Notifications.

2

Scroll to Calls, choose an option from the Ringtone list, and then click Save.

If you see a single ringtone list, that means you have a single phone line. If you have multiple lines, you'll see them and you can choose a ringtone for each one.

1

Click your profile picture and then go to Preferences > Notifications.

2

Scroll to Direct Calls and then choose an option from the Call Notification Sound list.

If you see a single ringtone list, that means you have a single phone line. If you have multiple lines, you'll see them and you can choose a ringtone for each one.