The ornamental design for a cellphonepocket on a wallet, as shown and described.
FIG. 1 is a front and left side perspective view of a wallet showing my new design with the pocket cover open;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a back elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines showing of the wallet are included for the purpose of showing unclaimed environmental structure only and form no part of the claimed design. The fine dotted lines shown in the cellphone pocket on a wallet depict unclaimed decorative stitching, which also forms no part of the claimed design.