I've noticed that my screen brightness is different on my phone compared to a 7 plus I've seen for demo in a store (in which I bought mine)
The difference is on the white balance. More brightness and more real white on the one in the store.
My OS is 8.1 and the one in the store is 8.0.
Question : did Nokia perform some changes on screen calibration between the 2 versions or is it my phone that has some troubles ?