What if Apple's mobile phone suddenly turns black and white?

Take iPhone11IOS13 as an example. It may be that Apple's mobile phone has become a black-and-white screen due to accidental touch, or it may be because it occasionally uses non-original mobile phone accessories. The specific solution to turn Apple's mobile phone into a black-and-white screen is as follows: Method 1: 1. First turn on the phone and click "Settings"; 2. Open the settings, find "General" in it, then find "Auxiliary Function" in "General", and click to enter the auxiliary function; 3. Then find "Zoom" in "Accessibility" and "Zoom Filter" in "Zoom"; 4. At this time, you will find that the "Zoom Filter" displays "Gray Scale", then click to enter the selection interface and select "None", and you will find that the color is back. Method 2: 1. Click on the desktop with three fingers at the same time on the main interface of the mobile phone, and then turn on the magnifying glass; 2. Then directly select the filter, and then select "None" in the filter to quickly restore the color.