FIG. 1 is a front elevation of a phone adapter showing my new design;

FIG. 2 is a back elevation thereof;

FIG. 3 is a back perspective view thereof;

FIG. 4 is a front perspective view thereof;

FIG. 5 is a side elevation thereof;

FIG. 6 is a side elevation of the side opposite that shown in FIG. 5; and,

FIG. 7 is a top plan view thereof.

The broken line showing of environment in the drawings is for illustrative purposes only and forms no part of the claimed design.