I claim the ornamental design for a personal mobile device radiation shield, as shown and described.
FIG. 1 is a perspective view of a personal mobile device radiation shield, showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right-side elevational view thereof, the left-side elevational view being a mirror image thereof;
FIG. 5 is a cross-sectional view thereof as seen along line 5-5 of FIG. 3;
FIG. 6 is a rear elevational view thereof; and,
FIG. 7 is a front elevational view thereof.
The broken lines showing a mobile device in FIGS. 1 and 4 depict environmental subject matter only that forms no part of the claimed design. The broken lines in FIG. 5 depict the internal structure of the radiation shield that forms no part of the claim.