99.5% of the time I only call my wife, my parents, my sisters, and my four best friends. That's 9 people. With my so much missed flip-phone I could do this, check it out:

Walk around the city with phone in pocket. Need to call one of them: pick phone from pocket (without looking), thumb-flick the screen open (without looking), thumb-press the person's speed dial number (without looking), done.

or

Walk around the city with phone in pocket. Phone vibrates. pick phone from pocket (without looking), glance at front screen for 1/3 sec to see who it was. If wanted to take the call, thumb-flick the screen open (without looking) while raising phone to ear (without looking), done. If not, toss phone back in pocket.

There was also the cost-of-phone factor. The thing was so cheap, I treated it like there was an old crumpled piece of paper in my pocket, never worried if it would get scratched or if the screen would crack. The constant worry when my smarphone falls on the floor sucks. I never had a better phone experience than with my flip-phone. Sadly, recently Whatsapp became so ubiquitous here, that people stopped calling and only texted, and eventually I had to upgrade.