Hah, I was flying DTW-GRU about a year ago, and the ATL flight couldn't get PAP Center to answer at about 1 or 2 am. So, I whip out my phone and play the classic ring tone using the hand mike. Rring, rring! "Is there a Delta flight calling Port-au- Prince?". We got a good laugh out at the bar the next night with the ATL crew.