A system comprising: a first electronic device (101, 102, and 103) comprising a communication unit (139a, 139b, and 139c) capable of wireless communication in a first frequency band and a communication unit (139a, 139b, and 139c) capable of wireless communication in a second frequency band; and a second electronic device (101, 102, and 103) comprising a communication unit (139a, 139b, and 139c) capable of wireless communication in the first frequency band and a communication unit (139a, 139b, and 139c) capable of wireless communication in the second frequency band, characterized by further comprising: a third electronic device that transmits a first instruction to a first one of the first electronic device (101, 102, and 103) or the second electronic device (101, 102, and 103), wherein the first one of the first electronic device (101, 102, and 103) or the second electronic device receives the first instruction and executes a first test, the first test comprising transmitting a first test signal to the second one of the first electronic device (101, 102, and 103) or the second electronic device in the first frequency band, the second one of the first electronic device (101, 102, and 103) or the second electronic device receives the first test signal and transmits a first response signal to the first one of the first electronic device (101, 102, and 103) or the second electronic device in the first frequency band, the first response signal indicating a success or a failure of reception of the first test signal, and the first one of the first electronic device (101, 102, and 103) or the second electronic device (101, 102, and 103) receives the first response signal and transmits the first response signal to the third electronic device. a first electronic device (101, 102, and 103) comprising a communication unit (139a, 139b, and 139c) capable of wireless communication in a first frequency band and a communication unit (139a, 139b, and 139c) capable of wireless communication in a second frequency band; and a second electronic device (101, 102, and 103) comprising a communication unit (139a, 139b, and 139c) capable of wireless communication in the first frequency band and a communication unit (139a, 139b, and 139c) capable of wireless communication in the second frequency band, characterized by further comprising: a third electronic device that transmits a first instruction to a first one of the first electronic device (101, 102, and 103) or the second electronic device (101, 102, and 103), wherein the first one of the first electronic device (101, 102, and 103) or the second electronic device receives the first instruction and executes a first test, the first test comprising transmitting a first test signal to the second one of the first electronic device (101, 102, and 103) or the second electronic device in the first frequency band, the second one of the first electronic device (101, 102, and 103) or the second electronic device receives the first test signal and transmits a first response signal to the first one of the first electronic device (101, 102, and 103) or the second electronic device in the first frequency band, the first response signal indicating a success or a failure of reception of the first test signal, and the first one of the first electronic device (101, 102, and 103) or the second electronic device (101, 102, and 103) receives the first response signal and transmits the first response signal to the third electronic device. a third electronic device that transmits a first instruction to a first one of the first electronic device (101, 102, and 103) or the second electronic device (101, 102, and 103), wherein the first one of the first electronic device (101, 102, and 103) or the second electronic device receives the first instruction and executes a first test, the first test comprising transmitting a first test signal to the second one of the first electronic device (101, 102, and 103) or the second electronic device in the first frequency band, the second one of the first electronic device (101, 102, and 103) or the second electronic device receives the first test signal and transmits a first response signal to the first one of the first electronic device (101, 102, and 103) or the second electronic device in the first frequency band, the first response signal indicating a success or a failure of reception of the first test signal, and the first one of the first electronic device (101, 102, and 103) or the second electronic device (101, 102, and 103) receives the first response signal and transmits the first response signal to the third electronic device.