I carry my cell phone on the slopes, but ski in New Hampshire and VT and thus rarely have any reception. When it rings, I jump, and I'm surprised and embarrassed if anyone's nearby. But I have gotten some important calls, and taken them, and I'm glad of that when it happens.
Two stories - the time I answered the phone while I was on the chairlift alone, and dropped it. Bad, bad, bad. I had an awful climb up under the lift forever past five lift towers to retrieve the thing, and of course it was buried in 8" of snow. But I did persevere and found it, only to drop it in the toilette later (go figure ... interesting day). It somehow survived.
Second story - got a call from my daughter while at Killington, tucked the phone under my helmet against my ear, and skied off talking. When she realized I was breathing hard, she hung up on me! I really coulda done it. She has no respect....