Fault description:
Screen malfunction with uneven backlight or white/yellow/black spots.
Cause Analysis：
It is a normal phenomenon, caused by the process characteristics of LCDs.
Solution：
Mobile phone with LCD screen material, the screen of a mobile phone is presented by a white light from a backlight that penetrates a film with colour. The phenomenon of yellowing and whitening or uneven display at the edge of the mobile phone screen is caused by the penetration effect produced by the backlighting position. It's the characteristic of the LCD phone screen to emit light. The phenomenon is easily observed when the phone screen image is displayed in a single colour. This will not affect the daily use of the mobile phone screen and the durability of the mobile phone screen.
If it affects your normal use, please backup your data and bring the proof of purchase to the nearest service center for help.