The present invention teaches that a small standardized plate may be affixed to a cellular telephone or item of office equipment. The plate has a first fastener portion. The base unit of a wireless headset and base unit device is equipped with a second fastener portion which cooperates with the first fastener portion on the plate to secure the base unit to the plate and thus to the cellular telephone or office equipment. The plate may be permanently affixed to the surface of the telephone or other item by such means as adhesives, because when it is necessary to remove the base unit from the surface, it may be unfastened from the plate, leaving the plate in place. The fasteners used may be metal snaps, plastic snaps, hooks, clasps, clips, fabric hooks, magnets, latches and combinations thereof. In alternative embodiments, there may be extra fasteners.In embodiments, the fasteners may be standardized in type, dimension and configuration so as to allow interoperability and portability of the base units: a given base unit may be removed from a given surface and replaced with another base unit, or transferred to another surface equipped with a plate of the invention.The second fastener portion may be adhesively affixed to the base unit, may be integral with the base unit or may be otherwise attached to the base unit in a manner which may be permanent.