Enabling a user to purchase a ring back tone

A system comprising:

• a processing device;
• a memory storing a table storing a plurality of codes each associated with a corresponding RBT;
• and
• a non-transitory storage medium storing executable instructions for causing the processing device to perform functions including functions to:
• generate and send, to a mobile device, an offer message offering for purchase a Ring Back Tone (“RBT”) and including a reply-to telephone number;
• in response to the offer message, receive a reply message sent from the mobile device to the reply-to telephone number of the offer message;
• extract a code from the reply-to telephone number to which the received reply message was sent;
• identify, in the table storing a plurality of codes each associated with a corresponding RBT, a particular RBT associated with the code extracted from the telephone number;
• and
• determine that a user of the mobile device desires to purchase the particular RBT associated with the code in the table, based on the identifying function.

A method comprising steps of:

• generating and sending, to a mobile device, an offer message offering for purchase a media file and including a reply-to telephone number;
• in response to the offer message, receiving a reply message sent from the mobile device to the reply-to telephone number of the offer message;
• extracting a code from the reply-to telephone number to which the received reply message was sent;
• identifying, in a table storing a plurality of codes each associated with a corresponding media file, a particular media file associated with the code extracted from the telephone number;
• and
• determining that a user of the mobile device desires to purchase the particular media file associated with the code in the table, based on the identifying step.