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.
Source: http://www.gsmarena.com/sony_mwc_2017_xperia_xz_ultra_xz_xa1_xa1_ultra-review-1576.php
