2004 - I think my wonderful boss at the time, Derek Hanlon, had a Sony Ericsson P910, and I was pretty transfixed with it. It seemed to do everything, and looked pretty cool. I loved the way you could remove the hardware keyboard if you wanted, and yes I did. I was getting rid of physical keyboards long before Steve Jobs.
I really loved that phone at the time, it's only real downfall was it was quite a hefty beast. It was touchscreen - responsive to touch and the included stylus. It had that multi directional scroll wheel that my J5 had, except this could go in 5 directions to navigate menus without using the touchscreen - super cool and great for one handed use. It had GPRS, so I dabbled in mobile internet now and again - most memorably trying to find the local Chinese whilst on a shoot in Leeds - Google had a very quick mobile site even then. It's home screen had 9 touch screen speed dial's - which was brilliant - interesting why Apple never built that into iOS. It also had some apps, and you would have to forage through the web to find some. Apple really made that process remarkably easy (and successful) with the App Store - it was a massive pain to find mobile apps in those dark days.
It had a camera, which was only VGA - so I used it sparingly for video mostly. The Bluetooth allowed Apple's iSync to work - which was awesome, so I could sync my contacts with my MacBook.
It also had a native email client, that was pretty great for the time. That must have been one of the best phones at that time, maybe the Treo's were up there too? Here's a review of it from the time. It interestingly has almost the same dimensions of the original iPhone (apart from the depth) - but it did have cut, copy & paste!
I used that phone very happily for some time, I then received a free upgrade 18 months later from Vodafone - the Sony Ericsson M600.