The ornamental design for a bracellphoneholder accessory, as shown and described.
FIG. 1 is a perspective view of the bra cell phone holder accessory;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear 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 bottom plan view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a perspective view thereof wherein the bra cell phone holder accessory is attached to the inside of a bra.
The broken lines showing the bra and attachment strap in FIG. 8 are included for the purpose of showing environmental structure and forms no part of the claimed design.