iOS iPhone and iPad: Turn off Repeat Text Alerts in iOS9

If you are sent a text or iMessage, your iPhone will by default alert you of the message *twice*.  This is often unnecessary, and many users find it annoying.  To turn off repeat text alerts<

1. Open the Settings app.
2. Go to ‘Notifications’
3. Go to ‘Messages’.
4. Tap ‘Repeat Alert’.  Set them to ‘Never’.