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My first iPhone was the Gold 5s (32gb), WOW, that seems so long ago....LOL
I remember when the first iPhone came out while I was in college. It was on AT&T so that was the first barrier. Then I saw the price and said "Nah...that's not happening" lol.
Then the iPhone 4 released on my carrier at the time (Sprint) and I went for it. Bounced between that (purchasing each subsequent release of the iPhone) and Android for a few years. Then the 6 released. Went iPhone only and never looked back.
To the OP:
https://en.wikipedia.org/wiki/IPhone_(1st_generation)
Kinda thought you had started with iPhones a good bit before then lol. The 5s had been my longest kept iPhone. I switch back and forth between iPhones and android, but see myself sticking with iPhones for a while.
First smartphone was a Blackberry that was nicknamed the Blueberry. The minute the iPhone was announced I had one on release day. And it was just called the iPhone.