I don't know if this will go anywhere but I feel I have to try.
I was visiting my mother at the hospital today, and when I got back to my car (in the Green Garage) I was shocked to see someone's cell phone on the hood of my car. I clicked it on to see if there might be identifying information.
Obviously I couldn't unlock it and nothing on the lock screen gave me a clue about who the owner might be or how to contact them.

As I was debating what to do with the phone, an employee was leaving the garage to go inside. I gave her the phone and asked her to give it to the lost and found or security. I figured they would be better equipped to deal with a lost phone than I would be.

So if someone who lost their phone at the hospital today is reading this, or someone reading this knows someone who lost their phone this Sunday, hopefully it is waiting for you at the hospital for you to get. I know I would be extremely distraught if I lost my phone, though why someone left their phone on my car I don't know. But maybe just maybe this post and us redditors can help them to get their phone back.