Apple has reportedly rolled out a new iOS version today, that is exclusive to the new iPhone 12 series of smartphones. iOS 14.2.1 is being rolled out to fix issues specific to the new devices, like the iPhone 12 mini's unresponsive lock screen, and MMS messaging issues. However, the changelog doesn't seem to offer a fix for green screen tinting issues some users have complained of, hinting that the trouble in that instance could be with hardware.