I would say get a 7 or maybe even 8. I'm still rocking the 7 but hope to upgrade very soon. They usually go for anywhere from $50-$125 and are still pretty good just for phone calls and texting. It's getting buggy for other things though, but if all you need it for is that, then it should be good! It can run on iOS 15 and still runs pretty smoothly for the most part