A slot mechanism for an electronic device is adapted to receive a card therein. The slot mechanism includes a slot disposed within the electronic device. A pivotally moveable tab is spring biased to protrude within an interior of the slot. A spring biased card release mechanism includes a first arm disposed within the interior of the slot and a second arm disposed exterior to the slot. The second arm is configured to prevent movement of the pivotally moveable tab by the card when the card is inserted in an incorrect orientation, thereby preventing complete insertion of the card. The first arm is configured to allow movement of the pivotally moveable tab by the card when the card is inserted in a correct orientation, thereby allowing complete insertion of the card.