How to Set Sounds on Your iPhone
The Sounds feature serves as your iPhone’s sound stage. This feature provides several sound options on your iPhone. It’s where you can turn on or off audio alerts for a variety of functions: new voicemails, new text messages, new mail, sent mail, and calendar alerts. This is also where you set ringtones.
The Sounds feature has more options. You can decide whether you want to hear lock sounds and keyboard clicks. You can determine whether the iPhone should vibrate when you get a call. And you can drag the volume slider to determine how loud your ringer and alerts will be.
You can also use the physical volume buttons on the side of the iPhone for this purpose, provided you’re not already on a call or using the iPod to listen to music or watch video.