Samsung, reportedly working on integrating the fingerprint scanner under the display, but at one stage the company had difficulties.

The problem arose with the brightness of the screen at the point where it integrates the fingerprint reader. According to the information of the @Ice Universe insider, the area occupied by the scanner differs in color from the rest of the screen.

The source even provided an image showing the color difference. Moreover, he notes that the company of Cupertino faced a similar problem.

Probably, it is because of this problem that Samsung Galaxy S8 and Galaxy S8 + received fingerprint scanners on the back panel. Frankly, not all users have to taste this solution.