Huawei P30 Pro Faq page 5

Why does the screen jitter, flicker, or produce a colour cast when I wipe, swipe, or tear the protective
film off the screen?
Cause:
1. When you quickly wipe or swipe the screen, static electricity is generated, which affects the
deflection of the liquid crystal molecules in the screen and causes the screen to jitter, flicker, or
produce ripples or colour casts.
2. When you quickly swipe the screen while using a non-standard protective film, the film is
likely to generate static electricity due to dryness or low-quality material and cause the screen to
jitter, flicker, or produce ripples or colour casts.
Solution:
When wiping the screen or removing the protective film, you are recommended to turn off the
screen, and use a soft cloth.
Vertical colour stripes appear on the phone screen
Cause:
Profile GPU rendering is enabled.
Solution:
1. Follow the steps below to resolve the issue: