There are times when you may want to turn off or mute sound on windows phone 7 when you are in public or just in case when you in a auditorium or classroom.
Make Windows Phone 7 Silent [Quick Way]
- Press the volume button and tap the Ring icon (a bell in a circle)
- The icon changes to Vibrate (3 wavy lines) to show that the phone is muted.
- Repeat the process to turn the ring on again
You can read more windows phone 7 tips here