What is claimed is the ornamental design for a mobile telephone holder, as shown and described.
FIG. 1 is a front perspective view of a mobile telephone holder showing the new design in use by a driver wearing a seatbelt, with a mobile telephone positioned therein;
FIG. 2 is an elevated front view of the mobile telephone holder in accordance with the present invention;
FIG. 3 is an elevated rear view thereof;
FIG. 4 is an elevated right side view thereof;
FIG. 5 is an elevated left side view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The driver, seat belt, seat and mobile phone shown in double-dashed lines in FIG. 1 depict environment only and form no part of the design claimed. The stitching shown in dashed lines on the mobile telephone holder in FIGS. 1 through 5 forms no part of the design claimed. Any surface shading is used solely to show the character or contour of the surfaces represented.