The multitouch screen interface. A mobile browser that works. Visual voicemail. Text messages threaded in a conversation view like a chat client. And that was

The multitouch screen interface. A mobile browser that works. Visual voicemail. Text messages threaded in a conversation view like a chat client. And that was just version 1.0 in 2007, which is still better than most Nokia phones today. Then they launched the App Store and the iPad. I'm sure someone had a touch screen phone, somewhere, before the iPhone. But no one nailed all those little features of user experience. I'm sure the software/hardware for a consistent multitouch screen capable of being manufactured at scale was alone a very big deal.