QUOTE(frozzbyte @ Jul 5 2008, 10:41 PM)
NO disrespect to mods but where does the usability concept of the iPhone comes from if not from the OS itself. The ease of use and intuitive UI comes from the OS and been complimented by the hardware. This is what google did with Android. They develop the OS first and it will later cater to a wide range of hardware from the OHA (Open Handset Alliance). SDK's are just tools for developers to easily create apps for the intended platform and I agree with you about the success of an app depends on its usability.

Actually no. You're mixing up the differences between the various layers here. At the very core, the OS is just the OS, where it enables something to run. The user interface is something that is built on top of the OS, where if you mess this up, you mess up the entire thing. The OS allows for the user interface that you see to be created, but that's about it. Try playing around with Xcode's Interface Builder, and you'll find that without the right amount of planning put into your interface design, you can still very much mess up the usability aspect of any application that you wish to build.
What I'm really addressing here is the misconception that as long as the OS is done properly, that's all there is to the usability aspect of it, but there's much more to it all than just the OS. In fact, try hunting through Apple's developer documentations, and you'll find one long and very complete document dedicated to just user interface design guidelines, of which shows the importance of not relying too much on the OS' looks and feels to do everything for you.
Added on July 5, 2008, 11:12 pmQUOTE(gengstapo @ Jul 5 2008, 10:10 PM)
if iphone use the symbian/ win mobile, its not worth to get as it would much alike those ordinary phone. iphone mean to be osx, thats what make the different.. IMO
here's something else to think about as well. even if the iphone has got a relatively stable OS, but uses the same sort of user interface as symbian or winCE, you'll still run into the same sort of complains.