I have ICE #'s in my phone and would like to have a dog tag (gotta do that).
Often don't carry a wallet on person as I work in scrubs and off-duty don't like sitting on the darned things.
Working EMS back in the day, we rolled on a wreck on the I-77: nighttime, 2300hrs or so, pickup rolled on it's side in a laurel thicket. It had obviously rolled several times. Woman hanging out the drivers window w/seatbelt around waist only, naked above the waist. DOS. Responders saw camper-top on shoulder and male body in sleeping bag along edge of brush (could have been missed in the dark). Moans coming from in the thicket. 10 yr old boy located after short search, critically injured. He was calling for his sis (don't remember how we determined it was his sister and not Mom). We tore up an acre+ of laurel lookin for that kid. A couple hours and calling #'s from addresses found in wallet, or 411 cross ref'd from DL and registration info, troopers located kid at grandma's 400 miles away.
FYI: Conjecture was mom was topless because boyfriend was asleep in back of truck( matress, camper-top, sleeping bag) and boy was front seat passenger, probably unstrained, asleep on seat and grabbed mom's shirt when truck rolled, pulling it of and both went at least partway out the window. Cell w/ ICE would have saved a lot of time.
Put a couple emergency contact #'s in your cell and hope they're never needed!
Stay safe.
Bob