A mobile phone, comprising a Near Field Communication, NFC, module , an alarm , a control circuit , and a battery , wherein the control circuit is connected to the NFC module and the alarm, and the control circuit comprises a flip-flop , a switch chip , and a counter ; the battery is directly connected to the NFC module , the control circuit and the alarm , and the battery is configured to output a voltage to supply power to the NFC module , the alarm , and the control circuit for normal running, when the mobile phone is in a power-off state; the counter is connected to the flip-flop and the NFC module ; the NFC module is configured to perform a card swiping operation according to a received card swiping request, and generate an interrupt signal, when the mobile phone is in the power-off state; the flip-flop is configured to output a first toggle signal according to the interrupt signal output by the NFC module , wherein the first toggle signal is used to indicate that an output status of the flip-flop is toggled; the switch chip is configured to start the alarm according to the first toggle signal output by the flip-flop ; the alarm is configured to send an alarm signal, when the mobile phone is in the power-off state; the counter is configured to: start counting according to the interrupt signal generated by the NFC module , stop counting when a count reaches a preset value, and generate a counting stop signal; the flip-flop is further configured to output a second toggle signal according to the counting stop signal generated by the counter , wherein the second toggle signal is used to indicate that the output status of the flip-flop is toggled; and the switch chip is further configured to turn off the alarm according to the second toggle signal output by the flip-flop . the control circuit is connected to the NFC module and the alarm, and the control circuit comprises a flip-flop , a switch chip , and a counter ; the battery is directly connected to the NFC module , the control circuit and the alarm , and the battery is configured to output a voltage to supply power to the NFC module , the alarm , and the control circuit for normal running, when the mobile phone is in a power-off state; the counter is connected to the flip-flop and the NFC module ; the NFC module is configured to perform a card swiping operation according to a received card swiping request, and generate an interrupt signal, when the mobile phone is in the power-off state; the flip-flop is configured to output a first toggle signal according to the interrupt signal output by the NFC module , wherein the first toggle signal is used to indicate that an output status of the flip-flop is toggled; the switch chip is configured to start the alarm according to the first toggle signal output by the flip-flop ; the alarm is configured to send an alarm signal, when the mobile phone is in the power-off state; the counter is configured to: start counting according to the interrupt signal generated by the NFC module , stop counting when a count reaches a preset value, and generate a counting stop signal; the flip-flop is further configured to output a second toggle signal according to the counting stop signal generated by the counter , wherein the second toggle signal is used to indicate that the output status of the flip-flop is toggled; and the switch chip is further configured to turn off the alarm according to the second toggle signal output by the flip-flop . <EOS>