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They can feed the ICE number in the mobile phones carried by elderly, who may faint outside their homes in a park or on road, or may just forget their address. If they are carrying the mobile number at least someone can contact the right person.
Just a few days back I found a 50-year old, fully drunk, lying on the road. There were people around and one of them trying to locate the number on which to call. And it was a big struggle since most people have 100s and 1000s of contact numbers in their mobile phones and to identify the right person quickly is often a challenge. Had there been ICE number added in the mobile, it would have been much easier.
So just put it in your Mobile. Today. Now!