I always carry my cell phone with me in case I have an accident or my bike gets broken beyond repair. I haven't needed to use it yet, but you never know. I hate talking on the phone so I just picked up one of those prepaid phones for emergency purposes. 500 minutes usually lasts me all year. As a bonus the phone has a camera in case I want to take a pic and then send it to my email etc. Plus I go out more often than not at night in the woods and ride on trails so if I get injured enough to not be able to get out I can call for help. It's good for peace of mind.