My iPhone sits in my pocket without a case or any protection other than a back-up battery sometimes and it's survived with just a few slight scratches for eighteen months, the only actual damage is the loss of a little bit of the rear case around the headphone socket when I dropped it with the 'phones in and knocked the plug hard, cracking the plastic. Phones actually came off worse, with an internal wire breaking, but Ultimate Ears replaced them after fourteen months, and everything still works just fine. The new 4G phone coming next month is flat front and back with toughened glass panels fitted to an aluminium frame, so damaging the phone should be much more difficult, especially around the headphone socket. Not a 'robust' phone, perhaps, but tough enough for most purposes. And fingerprints just wipe off with your t-shirt, you don't need fancy screen protectors, they're a waste of money with a glass screen.