A retainer includes a main body having a top wall, a first side wall, a second side wall spaced opposite the first side wall, a front wall, and a rear wall spaced opposite the front wall along a longitudinal axis. The walls define an interior cavity sized and shaped to receive an accessory plug. The front wall defines a front opening that extends into the interior cavity and is sized and shaped to receive a portion of a cable. The front wall also includes a first hook and a second hook each positioned below the front opening. The rear wall includes a third hook extending forward into the interior cavity. The retainer is moved forward linearly, and parallel to the longitudinal axis, to secure the hooks to a portable communications device.