There were a lot of similar phones in 2005. The two main differences are app ecosystems and capacitive screens. Both apps and touchscreens existed back then. What we have today isn't magical or revolutional, but just evolution, and slow at that.

My Dell Axim had a 624 MHz CPU, 256 MB, wifi, Bluetooth, 3,7 inch VGA screen, TV-out and two card slots, one that could be used to upgrade it. 2005.