FIG. 1 is a front perspective view of first embodiment of a rear panel for a handset showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a front perspective view of a second embodiment of a rear panel for a handset; and,

FIG. 4 is a front view thereof.

The depicted location and orientation of each of the two embodiments of the claimed portion of the rear panel (shown in solid lines) relative to the boundary of the unclaimed portion of the rear panel (shown in broken lines) is for illustrative purposes only and forms no part of the claimed design. The broken line immediately adjacent to the portion of the rear panel shown in solid lines represents an unclaimed portion of the boundary of the design. The broken line showing of the remainder of the handset is for illustrative purposes only and forms no part of the claimed design.