An electronic device and related operations are disclosed, including a communication circuit, a memory and a magnetic stripe transmission (MST) module for radiating a magnetic pulse. A processor implements the operations, including: controlling the MST module to change an emitted radiation pattern of the magnetic pulse in prespecified order to iteratively emit the plurality of radiation patterns, in response to detecting a prespecified event, selecting a presently emitted radiation pattern of the magnetic pulse, and storing information corresponding to the selected radiation pattern in the memory, or transmitting the information corresponding to the selected radiation pattern to the server.