According to the embodiment of the invention a communication apparatus including: a first communication module radio communicating based on a first radio access technology; a second communication module radio communicating based on a second radio access technology; a first information storing module storing radio access technology information indicating at least one of the first and second radio access technologies to be used in a radio communication of the communication apparatus; a chip storing module configured to store an information chip that stores company information with respect to a company providing a communication service; a search module configured to read out the company information from the information chip to perform a radio wave search according to one of the first and second radio access technologies based on the company information; and a setting module configured to set the radio access technology information in the first information storing module based on the result of the radio wave searching