Abstract: The invention provides a method for purchasing and payment of audio and/or video data provided on a provider's platform in a computer network, preferably the Internet comprising the steps of taking a customer's order for audio and/or video data files; providing a download of ordered audio and/or video data files for the customer; and debiting a mobile telephone account of the customer. In a preferred embodiment of the method of tho invention the customer's order is given via mobile telephone, and transmitted from a wireless network which the mobile telephone is connected to, into a computer network, preferably into the Internet.