The black and white color filter option or grayscale mode feature was first introduced with iOS 8. In this post, I will tell you the reason which causes your iPhone screen to turn grayscale or greyscale (Black and White) and we will also learn how to fix it in a simple way.
So, I went to the settings app again to dig around different options and finally found the cure. After not getting much help there in the settings app, I restarted my iPhone and the problem still did not go away. I first looked into the settings app, tried to find the option which might have got turned on causing my iPhone’s screen to look grayscale like a black and white TV set.
I was not aware of this Grayscale mode (Black and White color filter) feature in iPhone until my iPhone screen suddenly turned black and white.