Why does the phone have white lines on its edges?

Applicable products: Tablet,Smartphone
Applicable system: Unrelated to OS version
Applicable products:
Applicable system:
The following are the search results, Please select
Unable to find the result, Please select again.
zoom in pic
Why does the phone have white lines on its edges?

There is a white line on the front edge of the mobile phone.

The screen glass is 2.5D. This white line is the normal effect of the edge. Please rest assured.

Helpful or not?
Thanks for your feedback.