>It wasn't the iPhone itself. What changed was the AppStore. I had a WIndows 6.x phone for several years and while there were apps, I had to go to multiple sites to find them.
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>>Funny... Say me just one successfull MS phone... :)
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>>Iphone was first really smart smartphone. They changed the rules.

I think the App Store is only part of it. The iPhone was successful for the first year before the App Store was launched. The experience using an iPhone was significantly different than any previous smartphone, at least to a lot of people. What the iPhone did is be the first smartphone that really successfully implemented the right software for use with a handheld touch screen, and not requiring a stylus. Having an iPod/iTunes functionality built-in to the first iPhone also helped in early adoption.