A communication apparatus configured to form a first state, which is a specific state for performing communication with a first mobile device having a telephone function, and a second state, which is the specific state, if call receiving information, which is output from the first mobile device due to the first mobile device receiving a call request from external, is received while the first state is formed. In the first state, an execution of first processing instructed from the first mobile device is capable and an execution of a plurality of processing including the first processing, which is instructed from a second mobile device different from the first mobile device, is incapable. In the second state, an execution of a part of processing among the plurality of processing incapable in the first state is capable.