A method to control a communication device to communicate with a first external device in a first communication method and with a second external device in a second communication method is provided. The method includes steps of determining prior to communicating in the first communication method whether the communication device is under an ongoing communication session in the second communication method, executing one of switching the communication methods in the communication device from the second communication method to the first communication method when the communication device is not under any ongoing communication session in the second communication method and maintaining the second communication method set in the communication device when the communication device is under an ongoing communication session, and communicating with the first external device in the first communication method after switching the communication methods from the second communication method to the first communication method.