Communication method, apparatus, and system for password-free login based on using network resources of telecommunications operators

A communication apparatus, comprising:

• at least one processor, wherein the at least one processor is coupled to one or more memories storing programming instructions for execution by the at least one processor to perform operations comprising:
• sending a first uncharged traffic message to a core network device, wherein the first uncharged traffic message is for triggering the core network device to send a second uncharged traffic message to the communication apparatus;
• receiving the second uncharged traffic message from the core network device, wherein the second uncharged traffic message comprises login information, and the login information allows the communication apparatus to log in to an application server;
• and
• sending the login information to the application server to log in to the application server, wherein both the first uncharged traffic message and the second uncharged traffic message are transmitted via a base station without generating to-be-charged traffic, wherein each of the first uncharged traffic message and the second uncharged traffic message is a control plane message transmitted via the base station and not via a user plane data gateway, and wherein the first uncharged traffic message is a non-access stratum (NAS) registration message, and the second uncharged traffic message is a NAS registration accept message.