A method of controlling a flight mode is proposed. The method includes: receiving a flight mode trigger command when a mobile terminal is connected to the 2G network in data transmission and voice call; sending a voice call interruption command to a modem in the mobile terminal in response to the flight mode trigger command so as to interrupt the voice call with the modem; receiving a voice call interruption message sent by the modem and sending a request to the modem to deactivate a PDP; and sending a flight mode enabling command to the modem upon receiving a message from the modem notifying the PDP is successful deactivated, so that the modem enables a flight mode of the mobile terminal.