True smartphone? The Droid I still have.
Before that it was a mess of WM PDA's and semi smart phones like the LG Voyager.
It has some apps (not many) but came with a full fledged media player, web browser, navigation and more, so it sorta qualifies.
Also had the G1 for a week. And had a Palm Pre, BB Bold and Curve, Nokia E71, and the iPhone 4. But all of those were eventually turned in.
My first smart phone would have been a Nokia E90 but I couldnt afford it.