Download Shtok for kavod beis haknesses! SHTOK will automatically turn your phone to vibrate or silent when entering the locations you choose, and turn the volume back on when you leave. Never find yourself in the awkward situation of frantically fumbling for your phone in the middle of davening! You’ll avoid being interrupted during davening and interrupting others as well.
The app is free - but please consider a donation of any amount to support K'nafayim, the nonprofit behind it. http://PayPal.Me/knafayim