A baseband module for communicating with a first electronic card connected to a first electronic card slot, said baseband module comprising: a first baseband unit that includes an application processor and a baseband processor; a switching unit coupled to said first baseband unit and to be coupled to the first electronic card slot; and a control unit coupled to said switching unit, and coupled to the first electronic card slot; wherein said control unit is configured to operate in a first transmission mode, in which said first baseband unit and the first electronic card slot are electrically interconnected via said switching unit such that said first baseband unit is able to communicate with the first electronic card that is connected to the first electronic card slot, when it is determined by said control unit that the first electronic card conforms with a subscriber identification communication protocol, the first transmission mode enabling operations related to mobile telephony service to be performed; characterized in that: said baseband module is an input/output device that supports the ISO 7816/ Universal Asynchronous Receiver/Transmitter specification; and said control unit is coupled to said first baseband unit and is further configured to operate in a second transmission mode, in which said first baseband unit and the first electronic card slot are electrically interconnected via said control unit such that said first baseband unit is able to communicate with the first electronic card that is connected to the first electronic card slot, when it is determined by said control unit that the first electronic card does not conform with the subscriber identification communication protocol, the second transmission mode enabling operations concerning electronic commerce to be performed. a first baseband unit that includes an application processor and a baseband processor; a switching unit coupled to said first baseband unit and to be coupled to the first electronic card slot; and a control unit coupled to said switching unit, and coupled to the first electronic card slot; wherein said control unit is configured to operate in a first transmission mode, in which said first baseband unit and the first electronic card slot are electrically interconnected via said switching unit such that said first baseband unit is able to communicate with the first electronic card that is connected to the first electronic card slot, when it is determined by said control unit that the first electronic card conforms with a subscriber identification communication protocol, the first transmission mode enabling operations related to mobile telephony service to be performed; characterized in that: said baseband module is an input/output device that supports the ISO 7816/ Universal Asynchronous Receiver/Transmitter specification; and said control unit is coupled to said first baseband unit and is further configured to operate in a second transmission mode, in which said first baseband unit and the first electronic card slot are electrically interconnected via said control unit such that said first baseband unit is able to communicate with the first electronic card that is connected to the first electronic card slot, when it is determined by said control unit that the first electronic card does not conform with the subscriber identification communication protocol, the second transmission mode enabling operations concerning electronic commerce to be performed. said baseband module is an input/output device that supports the ISO 7816/ Universal Asynchronous Receiver/Transmitter specification; and said control unit is coupled to said first baseband unit and is further configured to operate in a second transmission mode, in which said first baseband unit and the first electronic card slot are electrically interconnected via said control unit such that said first baseband unit is able to communicate with the first electronic card that is connected to the first electronic card slot, when it is determined by said control unit that the first electronic card does not conform with the subscriber identification communication protocol, the second transmission mode enabling operations concerning electronic commerce to be performed.