The ornamental design for the cell phone and headset holster combination, as shown and described.
FIG. 1 is an isometric view of a cell phone and headset holster combination showing the new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a side elevation view thereof, taken from the left side of FIG. 1;
FIG. 7 is a side elevation view thereof, taken from the right side of FIG. 1; and,
FIG. 8 is an isometric view of an alternative embodiment of a cell phone and headset holster combination showing the new design wherein the headset holster is alternatively located at the right side thereof.