The ornamental design for mobile telephone shell case, as shown and described.
1. Mobile telephone shell case
1.1 is a front, bottom and right side perspective view of the mobile telephone shell case.
1.2 is a front, bottom and left side perspective thereof.
1.3 is an enlarged perspective view of the top right corner portion thereof.
1.4 is an enlarged view showing the inner sidewall pattern therof.
Shell-type case for mobile telephone with curved outer corners, the inner contour of which consists, in particular, of three-dimensional interlocking polygons, and two different levels of thickness, and the outer contour of which consists, in particular, of regular polygons.