Abstract: Various embodiments of a novel mobile device headset interface module are disclosed. In one embodiment, the novel mobile device headset interface module has a roll-slip edge guard with a ridge at each edge endpoint. The ridge forms an elevated wall at each edge endpoint, which prevents slippage of an electrical wire that is rolled around outer surfaces of the mobile device headset interface module. The novel mobile device headset interface module may also include an upward-slope headset input port on a top surface of the mobile device headset interface module to reduce chances of impact-related damages or electrical disconnections to a headset input jack. Furthermore, in one embodiment of the invention, the novel mobile device headset interface module may also include a mute button, a length-adjustable wire roll extender attached with the roll-slip edge guard, extender position-securing holes, a headset-securing clip, and/or a detachable belt strap.