Mobile ESN for XM Radio Receivers

A computer-readable medium having thereon computer-executable instructions for enabling authorized use of a satellite radio system, the computer-executable instructions including:

• instructions for receiving a user selection of content to be conveyed to the user;
• instructions for receiving authorization data from an external user-portable medium;
• instructions for retrieving an internal subscription data set representing an authorized user of the satellite radio system with respect to the selection of content;
• instructions for comparing the received authorization data with the internal subscription data set;
• and
• instructions for providing the content corresponding to the selection of content to the user if the received authorization data and the internal subscription data set match with respect to at least one preselected criterion and otherwise disallowing access of the user to the content corresponding to the selection of content.

A system for enabling authorized access to satellite radio content, the system comprising:

• a satellite radio system including:
• a decoding module for decoding encoded satellite radio content;
• a computer-readable memory containing a subscription data set;
• and
• a user-portable authorization media containing an authorization data set, wherein the decoding module is adapted to authorize access to the satellite radio content if the subscription data set and the authorization data set identify the same user or permissible related users, and to deny access to the satellite radio content if the subscription data set and the authorization data set do not identify the same user or permissible related users.