What model of “dumbphone” should I buy?

I have noticed that my phone has helped foster multiple negative habits in my life that I wish to change. I tried blocker apps, but they haven't been as effective as I want. Therefore, I have decided to downgrade my phone in the hopes that I won't be so tempted to engage in these unproductive behaviors and my habits will improve.

Could someone suggest a model of dumbphone for me? Really the only features I need are texting and phone calls. GPS would be a bonus.