Operating the Volume Controls

On the left side of your iPhone are two buttons that control the volume of the sounds, music, ringtones, and alarms generated by your iPhone. If no headphones, headset, or external speakers are connected to the iPhone, these buttons control the volume of the phone’s internal speaker. If you have wireless or corded headphones, a headset, or external speakers connected to your iPhone, these volume buttons control what you hear through the external listening accessory.

When no music or sound effects are playing, pressing the Volume Up (+) icon increases the Ringer volume (what you hear when you receive an incoming call). Likewise, pressing the Volume Down (-) button decreases the Ringer volume.