Pressing the VOLUME UP and VOLUME DOWN buttons changes the volume of whatever sound is playing right now. If no sound is playing, it adjusts the media volume. Pressing the buttons also displays the volume control.
Here's how to turn on or off different types of sound and adjust their volume:
Tip: Whether the ringer is on or off, turning on
Vibrate for calls in
Sound settings makes your phone vibrate when you have incoming calls.