The ornamental design for portable phone, as shown and described.
FIG. 1 is a perspective view of the portable phone showing our design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an open view thereof.
The broken lines shown in FIG. 8, which are immediately adjacent to the claimed surfaces and define a frame around the keypad and display, represent the bounds of the claimed design, while the other broken lines within the non-claimed area of the frame are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.