I don't know how many times I get Phone Calls During a Performance on stage,.....I always lower my ringer volume before I start playing so the audience doesn't hear it I have "The GODFATHER Theme" on mine. But sometimes that very Important Business Call, New Gig Booking client, or an emergency, etc, will come in that you have been waiting for although the phone isn't ringing aloud you can see the screen light up with the name of the caller. I do however have a call message that says "Hello I am on stage performing please leave your message and I will return your call asap"....that's fine I can check my phone after the show or on a break, but the damage is done and many times that important call is hard to return and phone tag begins for days on end in some cases... Also for the rest of your set your mentally annoyed that you Missed that important call!!