Assuming you want a smaller screen, the iPhone SE is ounce-for-ounce one of the best bargains in tech. At $399, this is the most affordable iPhone ever, and yet it doesn't look, feel or perform like a cheap phone.
Powerful A9 processor; Compact design; Excellent back camera with Live Photo support; Strong battery life
Front camera not that sharp; Low-res display; Lacks 3D Touch