I carry my cell phone with me, but my family knows if I'm out riding I'm not answering. Leave a message. If they have an emergency call once, hang up and then call again. I'll stop as soon as it's safe for me to and call back. Otherwise, I'll stop at my next planned stop.

I mean really! what's that important?

Side story regarding emergencies:

one morning I was doing a practice tri training. We had a television station come out to interview us. I left the phone in the car. When I got back to the car, I had 6 messages. My Mother-in-law had fallen and had to go to the hospital by ambulance. I went straight to the hospital. I showed up covered with mud from the muddy lake we were swimming in and sweaty! Uggggg! I comforted my MIL and then asked the nurse if they had a shower for me. They immediately found one for me and brought me towels and soap.......LOL....I must have smelled really bad. As much as I would have liked to have been there earlier, I couldn't have done anything. EMS had been called and did their work and the world continued to revolve without me.