Display Screen with a Graphical User Interface for a Mobile Device

FIG. 1 is a front view of a display screen with a graphical user interface for a mobile device:

FIG. 2 is top view of the display screen with a graphical user interface for a mobile device;

FIG. 3 is a back elevation view of the display screen with a graphical user interface for a mobile device;

FIG. 4 is a right elevation view of the display screen with a graphical user interface for a mobile device; and,

FIG. 5 is a left elevation view of the display screen with a graphical user interface for a mobile device.

The broken lines showing a mobile device illustrate environmental subject matter and form no part of the claimed design. The broken lines showing a display screen and elements of the graphical user interface illustrate portions of the article that form no part of the claimed design.