If I were going to be nostalgic about a phone, it'd be the Sidekick II (Danger Hiptop outside the US). That was a banger. Physical keyboard, very comfortable form factor for double thumb typing. A modern take on that would be my ideal phone. The first Android Google Dev Phone 1 was also a great device, sharing lineage with the Sidekick.
<https://www.dumbphones.org/>
The other way to go is with an ultra-small laptop (typically 12--13"), a tablet with integrated keyboard, or a (usually DIY) cyberdeck.