A communication system may comprise an information processing device and a communication device. Communication between the communication device and the information processing device using the first wireless communication scheme may be performed. The communication device may send the connectable network identification information to the information processing device. Communication between the information processing device and the communication device using the second wireless communication scheme and using the second network may be executed, in case that the first network belongs is not included in one or more networks identified by the connectable network identification information. Communication between the information processing device and the communication device using the second wireless communication scheme and using the first network may be executed, in case that the first network is included in the one or more networks identified by the one or more connectable network identification information.