Some users think that because almost a thousand euros have been spent on a mobile, it will be infallible and will never fail. Big mistake. Obviously, the quality of the device both in hardware and software is much higher if we compare it with others of lower cost, but it is not a perfect machine, and sometimes it can give us a headache.
This is what is happening to some iPhone 11 users. For some unknown reason, the screen takes on a greenish hue. It does not prevent being able to use the iPhone with total normality, but obviously it is a mistake that has to be corrected in one way or another.
We could call it «the hulk effect«. The Marvel superhero, when angry, transforms from a normal person to a muscular green monster. Well, something similar is happening to some iPhones these days.
Complaints from some users of the 2019 iPhones are appearing in various internet forums (iPhone 11, iPhone 11Pro and iPhone 11 Pro Max). They explain that sometimes when they unlock their device, the iPhone screen takes on a greenish hue. It usually happens when unlocking the terminal or when going to dark mode. And not always, but randomly. And at times it can look good and at times greenish. A bummer, come on.
It is not known if it is a hardware problem or a "bug" in iOS 13.5
At first glance (and pun intended) it may seem like a hardware, panel, or display driver issue. But those who suffer from the error explain that this is happening since they updated their terminal to iOS 13.5, so a "bug" in the operating system is sensed. This would be the best for everyone, as Apple would quickly fix it with a new version of iOS.
If the problem were hardware, things get complicated. Apple would fix it anyway, but you would have to go through a free repair. Hopefully not. It has only recently been detected, and at the moment there is no response from Apple. Surely in Cupertino more than one has run out of weekend working on the issue. We will have to wait.
It happens to me with my iPhone 11 pro in dark mode, when unlocking the screen it turns green for about 5 seconds and then it adjusts to normality. It's annoying. Hopefully they fix it now.
For now, don't do anything and wait to see what Apple says ...