For anyone who is relying on cell phones for flats:
What if your battery is dead?
What if you're out of range?
What if no one you know is home/answering their phone?
PLEASE! learn how to change a flat. It can be really frustrating the first time, but then its really easy. Just practice at home. If you have a hard time using frame pumps, carry a mini pump and the CO2 cartridges. Then you still have the option of calling for help, but you also have the confidence of knowing you don't ever have to be stuck. You owe it to yourself and your family to be independent.
With that said, here's to flat-free riding!;)