There are provided methods and systems enabling a customer to order products from an audio advertisement, for example from a radio advertisement heard in an automobile, using only a standard audio receiver and mobile telephone. Pre-registration by the retailer advertising the product enables the storing of pertinent product information by a fulfillment center. Pre-approval of mobile telephone service(s) enables billing to be performed through a customer's mobile telephone account. The actual customer order is completed by simply dialing the telephone number transmitted in the advertisement. The remainder of the fulfillment and billing process is substantially automated. More specifically, the fulfillment center uses the dialed telephone number to determine the ordered product and the calling telephone number to determine delivery information. If the calling number is through an approved mobile telephone service provider and caller information can be determined, fulfillment occurs automatically with billing through the mobile phone account. If the calling number is not through an approved service or caller information is not determinable, the call is directed for other processing.