working smartphone (Hillingdon UB10)

Wanted: Any working smartphone.

I hate having to ask, but I’m currently using an old Nokia C12 that is so slow it’s becoming difficult to manage even basic daily tasks. Something as simple as checking emails, using Google Maps, applying for jobs or accessing important apps can turn into a frustrating battle.
At the moment replacing it simply isn’t financially possible for me, so I thought I would try asking here in the hope that someone may have an old smartphone they no longer use.
I’m not looking for anything fancy at all, and anything reliable enough to run modern apps would be incredibly appreciated.
Many thanks to anyone who reads this.