@CaptainHook - Same deal here. I use my phone for business so it rings incessantly. Although I do have a funny story about a personal phone call.
I'm at the hall and I'm in a particular pool playing mood on this night. I'm totally focused, playing very well, and feeling great about my game. My opponent is at the table and I'm 10,000% zoned in on what the table is doing.
RING RING It's the girlfriend.
Me: Hi honey, what's up?
Her: Nothing, what are you up to?
Me: At the pool hall.
Her: Blah, blah, blah.
Me: Uh huh. (I'm not even paying attention because my mind is on the game.)
Her: Adam? Adam? ADAM?
Me: Sorry, what was that?
Her: Did you pick up my hairspray or what?
Me: ? ...Honey, can we possibly discuss this later? I'm dead in the middle of a match and I can't really focus on hairspray at this very second.
Needless to say, I got berated by the guys at the hall for being whipped. Anyhow, my point is that I totally get the whole phone thing. Although, if you don't have a bluetooth headset, get one for pool playing purposes alone. If you MUST be on the phone, it's a lifesaver.