MWC 2017: Sony Xperia XZ Premium, XZ, XA1 and XA1 Ultra hands-on

While Sony seemed timid the last year, now it's ready to roar again. It poured all its tech prowess into the making of the Xperia XZ Premium, which marks a number of world firsts. The XZs is a mid-season upgrade of the former top dog, borrowing the Motion Eye camera from the Premium. Then there are the super mid-rangers - the XA1 impresses with its flagship camera, the XA1 Ultra with its selfie cam.