If this is the case, the phone is impossible to use the Finnish winter.
Some of Apple's new iPhone X -super phone users complain that the phone's otherwise been praised as the screen goes dark or starts to work poorly the already cool, +7 degrees, writes, inter alia, GBR.
Also reddit's Apple discussions complaining about the same thing.
Even the screen protector does not help the problem.
Although the screen is not completely pimenisikään, it does not, for example, obey the touch properly.
Then, say, writing gets tricky.