Ages ago I had a "wincy"(windows CE) phone, may have even been a nokia(I can't remember anymore) loved the thing dearly, it had a slide-out keyboard and an SD card slot you could actually easily pull cards in and out of(handy for editing word docs on the go, which I did!). If the battery hadn't died I'd still be using that phone, though various other bits of it had failed as the years went by.
After that I had some nonsense 'android' thing.
When that one died, I made a very significant upgrade to a Nokia Lumia 1510, which I ALSO loved the every-living crap out of, such a great phone, beutiful camera, just great.
Batteries seem to dictate my phone upgrades, after ~3 years the Lumia 1510's battery started to go, and about a week ago I switched over to a 950xl to get the Continuum feature. Liking the phone ok so far, HATE the power button placement and multi-button features, but really like the potential I see in Continuum.