The first iphone was the first time most people could actually use the internet on something they could carry around, even if it was just with wifi. It did everything phones did but much better since it was all touch. Interfaces to alarms, the calculator, the camera etc was entirely different. Anyone who used it knew that everyone else would either copy it or go out of business.
Windows Mobile and Symbian devices were a thing for years and had functioning browsers. The iPhone was an improvement (as long as you had wifi) but it took a couple of years before it actually become widespread
Exactly, you’d use the to do the same thing more or less but the iPhone had way better UX. The idea of browsing the web on your phone wasn’t something new or revolutionary, it was all about the implementation.
No, it wasn't the same. Before people would only be able to use special mobile pages and scroll through a few options at a time. Looking at a general site like reddit was basically impossible. Reading a news article on a normal site was basically impossible. It was a total game changer and most people went from never using the mobile internet to using it frequently.
You seem to have forgotten Blackberrys were incredibly popular. Most people in the business world browsed and did emails on them. Windows phone, LG Prada, Hiptop - all of these had non WAP browsers well before the iPhone. You've missed the 2-4 year gap between WAP only phones and first iPhone.
And how did you navigate them? With a scroll ball? Even some phones that were single touch with pressure were slightly better but most people wanted nothing to do with that until the iphone.