A method for using a smartcard is provided. The smartcard may include a microprocessor chip, a button, a dynamic transaction authorization number, a Bluetooth low energy (“BLE”) device, and a battery. The battery may power the BLE and the microprocessor chip. The smartcard may also include memory. The memory may store the dynamic transaction authorization number. The smartcard may also include a dynamic magnetic strip. The dynamic magnetic strip may include a digital representation of the dynamic transaction authorization number. The method may include pressing the button. The method may also include transmitting an instruction to a smartphone for a request for a dynamic transaction authorization number. The transmission of an instruction may be in response to the pressing of the button. The method may also include receiving a dynamic transaction authorization number from a smartphone.