The Importance of Controlling Volume
Being in control of your device volume has various advantages. For a start, excessive sound levels while making a phone call can be potentially deafening, while calls that are too quiet can be difficult to hear, with the extra effort you make to try and “tune in" potentially distracting from other tasks.
Meanwhile, if you’re a regular user of MP3s or other audio media on your phone, having control of the sound levels is naturally important for your general enjoyment.
High or low volume on Windows Phone 7 devices can be adjusted using the volume control rocker on the side of the device. When making a call, this enables you to increase or decrease the sound levels, and when the phone function isn’t in use, the volume adjusts the level of the ring tone as well as any MP3s or other audio. You can also activate vibrate mode using the volume control, either by tapping the sound icon that appears on your phone as you adjust the volume, or reducing the sound level right down.
Remember, of course, that MP3 files from varying sources (such as those purchased online or ripped from your own CD collection) are likely to have different volume levels.