If there is a record that smartphones fail to take a long time, it is that finesse. Less than two months after the arrival of Vivo X5 Max and his 4.75 mm thick, that’s a new winner has just been awarded the prize for the thinnest smartphone in the world. This is the Coolpad IVVI K1 Mini that displays only 4.7 mm thick.  Reduced dimensions that require course to make certain concessions, not only because of the fineness, but also the camera’s format that team a 4.7 inch screen against 5.5 inches for the Vivo X5 Max . Therefore, no question of housing a battery of more than 1800 mAh