I'd like a thicker, smaller phone (like 5") which can actually be operated with one hand. Ideally it should also be durable enough to not need a protective cove

I'd like a thicker, smaller phone (like 5") which can actually be operated with one hand. Ideally it should also be durable enough to not need a protective cover. (My Kyocera Duraforce came close; too bad it was locked to AT&T.)