I dropped mine out my bedroom window by accident, taking a picture of a beautiful sun set and and the window blew shut and I dropped the handset.
It bounced down the sloped roof below my window, the smashed screen first into the patio before bouncing and hitting the sundial.
I basically shat myself. But alas the only mark was a very small (3mm) crack in the light corner of the back glass.
It's also been dropped from around 6ft onto concrete face first, no damage.
BUT on a hot day last week I left it on my van's dashboard in direct sunlight. I had literally just replaced the screen protector and there wasn't any marks.
Come back an hour later and there is a large crack in the top right corner.... Caused by the heat!
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If it's broke, use a hammer. If that fails, you're not using a big enough hammer.