In thinking about Sandgrain's response to my previous post on this subject, it occurred to me that the ICE format could be extended to included your initials and the relationship.
ICE KJ DTR, ICE KJ SON, ICE KJ NIECE. This would give the user some link between a found cell phone and whose it was as well as an idea as to whom the paramedic might be calling. Just a thought. We never know, and it can't hurt. Ken J