LG GT540 Optimus

This was my very first true smartphone on Android OS. I've got it already with Android 2.1, though first ones were shipped with Android 1.6. And it had resistive touchscreen so I wasn't able to operate it with my fingertips - only nails or stylus (or any other sharp object) which was a terrible idea in terms of damage for the plastic screen. However, this was my very first touch-sensitive device and it was so awesome back in those days. It was slow and bugged but I was happy with it (though not for too long).

I gave it to my mom after changing my main phone.