A method for using a smartcard, the smartcard comprising a microprocessor chip, a button, a dynamic transaction authorization number, a Bluetooth low energy (“BLE”) device, a battery configured to power the BLE and the microprocessor chip, memory configured to store the dynamic transaction authorization number, a dynamic magnetic strip comprising a digital representation of the dynamic transaction authorization number, the method comprising:
- transmitting, upon depression of the button, an instruction to a smartphone for a request for a dynamic transaction authorization number;
- receiving a dynamic transaction authorization number from the smartphone;
- receiving a future timestamp and a new dynamic transaction authorization number from an administrative database network via an application on the smartphone;
- saving the new dynamic transaction authorization number to memory;
- and
- trigger, at the time of the future timestamp, writing from the memory to the dynamic magnetic strip, a digital representation of the dynamic transaction authorization.