All the smartphones I've owned (T-mobile G1, Nokia N900, Samsung Galaxy S2) have been dropped repeatedly onto floors, concrete, and down stairs. None had cases,

All the smartphones I've owned (T-mobile G1, Nokia N900, Samsung Galaxy S2) have been dropped repeatedly onto floors, concrete, and down stairs. None had cases, and none were affected in their functionality by this treatment (even the slider G1!). The SGS2 is a bit dented on all four corners and the back and corners are scratched up, but it's never had a problem working. I'm glad I've had the good luck to buy durable phones.