I'm thinking of getting a cheapo phone to bring around to places where I really don't want to lose/damage my expensive and awesome GS4. Places like the gym, pool/beach, and maybe concerts too. Mostly I wanted something where I can take my SIM card and put it in the new phone so I keep my number. And I want it to be able to play MP3s.
At first, I didn't think it was possible to find a phone like that, because my carrier doesn't use SIM cards except for LTE phones. But turns out there are used LTE phones as cheap as $25 on Ebay.
Plus it takes microSD so I can have my music. I can even surf the internet and such - it's an ancient smartphone, but it's still a smartphone.