System defect. IPhone 12 is a smart phone. If the home page of the software is always colorless when the mobile phone is running, it is the cause of the system bug. Just turn it off and turn it on again. IPhone 12 is a mobile phone product released by Apple in ApplePark Headquarters Park on June 2020/morning of kloc-0/4/Beijing time. IPhone 12 is 146.7mm high, 7 1.5mm wide, 7.4mm thick and weighs 65433. The exterior design adopts ionic glass and 7000 series aluminum metal shell, and adopts straight frame design, and the back color is black, white, red, green, blue and purple.