I had a similar experience, but the phone screen was cracked (pretty shattered, actually). Shortly after I found it (maybe 10 or 15 minutes) the screen lit up, and fortunately I guessed correctly that it was an incoming call that answered when I swiped right. Phone owner was on the line asking if someone had picked it up - he had left it on the roof of his car and driven off. He came and collected it 10 minutes later. I guessed that seeing as he knew the number he could have it.