How can I change default ringtone and volume for incoming calls?

a. Change default ringtone for incoming calls “Settings” -> “Personalization” -> “Sound” -> “Tones” -> “Ringtones” -> Select a ringtone.
b. Change volume for incoming calls
“Settings” -> “Personalization” -> “Sound” -> “Volume” -> “Ringtones & Alerts”
You will see a Volume Bar. Press left and right key to adjust the volume.

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