The phone undergoes rigorous professional inspection before leaving the factory, so you can use it with confidence. To improve the clarity of the display outdoors, you can try manually increasing the screen brightness or disabling automatic brightness and manually adjusting to an appropriate brightness level.
You can refer to the following steps to do so:
1. Go to [Settings] >> [Display & brightness] >> disable [Auto brightness];
2. Go to [Settings] >> [Display & brightness] >> slide the brightness bar to adjust the brightness level.