First off OP, my condolences. By the looks of your post, you've obviously suffered from a stroke of some sort which has impaired your ability to form coherent sentences. Get well soon.
On the topic of smartphones, I used to think like bagochina. It took me much longer than my peers to get one, but now I can't see myself not owning one. Seeing as I'm not on any social media, I'm not attached to my phone in the sense of always checking updates of other people's status and what not. It's more of a productivity issue; I check and reply to e-mails, use certain apps to check the weather on the go or find new restaurants in the area I'm in. The ability to bring up a map with GPS coordinates has saved me plenty of times. I also use my smartphone to pay for parking meters thus saving me from carrying a pocket-full of loose change, among other small tasks. And don't even get me started on Snapchat!
But if you're looking for a 'burner' smartphone, that's a bit of an oxymoron. I'm not that well-versed in pricing options, but regularly cycling through phones will get expensive after awhile.