Hey guys. I wanted to know if you could turn off every single sound on the inc. My previous phone, enV touch, still played some sound when u press clear to activate voice commands, even in vibration mode. (the voice that says, "please say a command. Beep") Anyways I don't want to accidentally press something or get a notification that makes a sound. All I want to know is if there's any hidden features that could play unwanted sound, even if the phone is in vibrate. I go to school and my phone will get taken away if a teacher hears it so this is important. Thanks