Abstract: A universal credit card with a cellular telephone that has inside of an outer housing and adjacent to a side thereof a magnetic reader/writer capable of reading data from a magnetic strip of a credit card. Along a side of the outer housing adjacent the magnetic reader/writer is a wide and deep enough slit to swipe the credit card. When a template credit card is swiped through the slit, a magnetic strip of the template credit card reads or writes data from at least one credit card that the user selected on the telephone's keypad from a plurality of credit cards whose data had been entered into memory. A controller and software operate the magnetic reader/writer the user's keypad selection. Alternatively, there is a slot in the outer housing rather than a slit, and insertion and/or removal of a credit card in the slot constitutes swiping the credit card.

Abstract: A universal credit card with a cellular telephone that has inside of an outer housing and adjacent to a side thereof a magnetic reader/writer capable of reading data from a magnetic strip of a credit card. Along a side of the outer housing adjacent the magnetic reader/writer is a wide and deep enough slit to swipe the credit card. When a template credit card is swiped through the slit, a magnetic strip of the template credit card reads or writes data from at least one credit card that the user selected on the telephone's keypad from a plurality of credit cards whose data had been entered into memory. A controller and software operate the magnetic reader/writer the user's keypad selection. Alternatively, there is a slot in the outer housing rather than a slit, and insertion and/or removal of a credit card in the slot constitutes swiping the credit card.