A method of converting a mode of a user interface in a mobile terminal. The holder securely attaches to the vacuum and readily detaches therefrom. Each tag signal reader includes a global positioning system receiver associated therewith for determining the location of a tag signal reader. The card holder system can further comprise an adapter member, the adapter member being designed and dimensioned to be coupled with the card holder such that the card holder may be selectively positioned in one of a first orientation and a second orientation, the second orientation being substantially rotated ninety-degrees from the first position.