Still with my first ever smartphone bought in august 2018. Felt like crying when i paid 850lei/195$/170euro for a phone, and if i didn't need the bank token and 2FA for some stuff i'd still be on a dumbphone.
The mighty Asus Zenfone 4 Selfie.
Battery is not what it used to be but it's ok if i don't "game" on it; i only play pool and nitro jump while i wait for idiots to make things happen anyway but still, those small uncomplicated games kick the crap out of it's battery and cpu, it gets really REALLY HOT.
No odd bheaviour, just the ocasional"sorry master, i can't switch from cel data to your wifi, would you mind doing it manually pls".
Other than that and the fact it only has Android 7 bcs it's old, i love it.
When i upgrade because i'm going to have to at some point i'll stay in the below 200$ or max 250$ pricepoint.