In my Gmail app, I have the "Also vibrate when email arrives" box checked. When I have my sounds on, it both makes a notification sound AND vibrates when I receive an email. When I have vibrate-only mode on, it only vibrates. However, if I uncheck the box, it does NOT vibrate when my phone is in vibrate-only mode. Is there any setting that causes Gmail to only vibrate in vibrate-only mode? I do NOT want it to vibrate when I have sounds turned on. Thanks.