I would still be using a 3GL flip-phone not a smartphone — but my USA service provider withdrew 3GL and forced an upgrade to 4GL VoLTE unsupported by the old flip-phone.
I don't know myself :)
I'm sure if I try to go with a dumbphone only I'll find fast what I need.
I'm off social media, but I have to use whatsapp.
Maps are important, and a decent camera too.
I use an app to track my sleep (fitbit), to book hours at the gym, to book dance classes... damn, all those are android apps. Even if I wanted to cart around a linux tablet or small laptop, these would be a problem.
I would still be using a 3GL flip-phone not a smartphone — but my USA service provider withdrew 3GL and forced an upgrade to 4GL VoLTE unsupported by the old flip-phone.
"standby time of 300 hours" https://www.cnet.com/reviews/kyocera-kona-review/
Maybe there's something here for you —
https://www.nokia.com/phones/en_us/feature-phones
Nokia 6300 4G supports WhatsApp.