Sorry, but I have yet to see a phone that can replace dedicated products. Smart phones do a lot of things good enough for average use but fail when you need precision.
You're probably 20 years late to this party. There are very, very, VERY few of the usual things that the phone replaced where the phones are doing a sub-par job. Maybe the only relevant somehow common example is a bright, telephoto lens, sure you can't beat physics and replace sometimes literally kilograms of glass with a lens as small as the tip of your pinkie. For the rest, the complains are usually overblown. Compact cameras are just about as good, as the good phones, what can one insist on, having more physical buttons? If anything phones have even decent advantages there: they're usually waterproof (while most compact cameras aren't), they have a huge screen that not even 50k$ camera have, networking capabilities that really work not the wifi afterthought that's a pain in even the mentioned multi-thousand$ cameras, encrypted storage and so on.
What else, mp3 players? What can one insist on, maybe better DACs in a particular model ... even if when that isn't audiophile "gold power cable" level bickering still there are phones with very good DACs (and many mp3 players had unspecified DACs just as much as the smartphones), and lately mostly everyone takes out digital signal from the phones so it doesn't even matter.
Digital organizers, or address books? C'mon. Oh, wait, I have a good one: alarm clocks! Remember when you had an alarm clock at home, and a nice folding travel alarm clock? How is the phone worse, not good enough haptics if you need to smash the snooze button?