On iOS

1. Launch your RIngCentral app.
2.Tap your Profile Picture Phone.
3. Below INCOMING CALLS, tap Ringtone.
4. Select your preferred Ringtone.

On Android

1. Launch your RingCentral app for Android.
2. Tap the Hamburger (three horizontal lines) icon > Settings.
3. Under Phone, tap Incoming Call Ringtone.
4. Select Ringtone.