AZChristian - Thanks from me too. I guess I've never thought of that. I walk the dog regularly. It's a pretty long walk. I live alone & don't have daily contact with anyone, except my job. If it was on a weekend or holiday time, I could lie in a hospital for many days before anyone would know. Even if my son called or stopped by, he'd just assume I was out & would get back to him.
I used to take my cell phone with me in my pocket, until I read (I think it was here) about the risk of cancer from carrying it next to your body a lot.
A wallet is awful bulky. Maybe I'll wear a tag saying "Hi, my name is Scarlet. If found please call -----------" Kind of like a dog name tag.