A control method of a communication system, wherein the communication system includes a communication apparatus capable of performing at least one by one wireless communication using a first frequency band and wireless communication using a second frequency band, and an information processing apparatus that communicates with the communication apparatus, the control method comprising: receiving, by the information processing apparatus, an execution instruction to execute processing for wirelessly connecting the communication apparatus and an external apparatus; and transmitting, by the information processing apparatus, upon reception of the execution instruction, connection information and frequency band information to the communication apparatus, the connection information being used to wirelessly connect to an external apparatus, the method being characterised in that said frequency band information is related to a frequency band which the external apparatus uses for wireless connection among the first frequency band and the second frequency band that the communication apparatus is capable of using; and the method further comprises: in a case where the connection information and the frequency band information are transmitted to the communication apparatus and the frequency band corresponding to the frequency band information transmitted to the communication apparatus is the first frequency band, establishing a connection by the communication apparatus by using the received connection information to the external apparatus found as a result of a search executed by the communication apparatus by using the received connection information and the first frequency band, and, in a case where the connection information and the frequency band information are transmitted to the communication apparatus and the frequency band corresponding to the frequency band information transmitted to the communication apparatus is the second frequency band, establishing a connection by the communication apparatus by using the received connection information to the external apparatus found as a result of a search executed by the communication apparatus by using the received connection information and the second frequency band. receiving, by the information processing apparatus, an execution instruction to execute processing for wirelessly connecting the communication apparatus and an external apparatus; and transmitting, by the information processing apparatus, upon reception of the execution instruction, connection information and frequency band information to the communication apparatus, the connection information being used to wirelessly connect to an external apparatus, the method being characterised in that said frequency band information is related to a frequency band which the external apparatus uses for wireless connection among the first frequency band and the second frequency band that the communication apparatus is capable of using; and the method further comprises: in a case where the connection information and the frequency band information are transmitted to the communication apparatus and the frequency band corresponding to the frequency band information transmitted to the communication apparatus is the first frequency band, establishing a connection by the communication apparatus by using the received connection information to the external apparatus found as a result of a search executed by the communication apparatus by using the received connection information and the first frequency band, and, in a case where the connection information and the frequency band information are transmitted to the communication apparatus and the frequency band corresponding to the frequency band information transmitted to the communication apparatus is the second frequency band, establishing a connection by the communication apparatus by using the received connection information to the external apparatus found as a result of a search executed by the communication apparatus by using the received connection information and the second frequency band. in a case where the connection information and the frequency band information are transmitted to the communication apparatus and the frequency band corresponding to the frequency band information transmitted to the communication apparatus is the first frequency band, establishing a connection by the communication apparatus by using the received connection information to the external apparatus found as a result of a search executed by the communication apparatus by using the received connection information and the first frequency band, and, in a case where the connection information and the frequency band information are transmitted to the communication apparatus and the frequency band corresponding to the frequency band information transmitted to the communication apparatus is the second frequency band, establishing a connection by the communication apparatus by using the received connection information to the external apparatus found as a result of a search executed by the communication apparatus by using the received connection information and the second frequency band.