Wireless electronic payment of a cellular phone to a commercial company for commodities and/or services, received from the company, through the company's register and a non-contact IC of the cellular phone is protected from being hindered by an incoming call or mail received by the cellular phone. To this end, an RF block of the cellular phone detects the incoming call or mail received externally over a communication line. The non-contact IC pays wirelessly and electronically for the commodities and/or services received from the company. If a CPU of the cellular phone is responsive to the RF block detecting the incoming call or mail when the non-contact IC is not performing the paying process for going to a telephone-call establishment process based on an off-hook operation in response to the incoming call. The CPU also automatically answers an external incoming call or mail when the non-contact IC is performing the paying process for producing a hold tone and sends it to the other party, thereby preventing going to a telephone-call establishment process for the incoming call.