A terminal device may acquire first connection information including a plurality of parameters, and send the first connection information to a communication device by using a first wireless connection and not via an access point. The first connection information is used in the communication device to execute a process for establishing a wireless connection with a target access point. The terminal device may receive a failure notification indicating that the process has failed from the communication device by using the first wireless connection and not via an access point in a case where the process in the communication device has failed, and display a cause screen indicating that the process has failed due to the specific parameter on a display unit in a case where the failure notification is received from the communication device.