My first touch screen phone I had was a HTC Hero. I had numerous Nokia N series phones which I guess could be classed as a smart phones? But always think of touch screen when the term smart phone is used
Fun fact: Nokia are the ones who coined the term smartphone, to describe phones that sat between their communicators (big PDA phones with keyboards) and feature phones.
So, yeah, the Nokia N-series phones were definitely smartphones even if they were primitive by today’s standards.