Non-transitory computer-readable storage medium storing computer-readable instructions for terminal device, printer, and communication system

A printer comprising:

• a print executing unit;
• a printer display unit;
• and
• a controller,
• wherein the controller is configured to:
• cause the print executing unit to execute a print preparation process;
• in a case where the print preparation process is started by the print executing unit, cause the printer display unit to display an introduction screen for introduction of a predetermined service which is related to the printer;
• and
• in the case where the print preparation process is started by the print executing unit, send start information indicating start of the print preparation process to a terminal device, wherein the start information is used to cause a terminal display unit of the terminal device to display an information input screen for input of subscription information, the subscription information being used to subscribe to the predetermined service.

A communication system comprising:

• a printer;
• and
• a terminal device,
• wherein the printer comprises:
• a printer display unit;
• and
• a printer controller configured to cause the printer display unit to display an introduction screen for introduction of a predetermined service related to the printer,
• wherein the terminal device comprises:
• a terminal display unit;
• and
• a terminal controller,
• wherein the terminal controller is configured to:
• in a case where information indicating display of the introduction screen on the printer display unit is received from the printer, cause the terminal display unit to display an information input screen for input of subscription information, the subscription information being used to subscribe to the predetermined service;
• and
• in a case where the subscription information is inputted in the information input screen, send the subscription information to a server.