Abstract: Incorporated in data is a price tag including price information about one or more service/product for trading by a customer. A charging agent associated with one or more network operators servicing the customer reads the price tag and if warranted, charges or credits the account(s) of the customer with the network operator(s) in accordance with the price information. In some cases the traded product(s) includes at least part of the data in which the price tag is incorporated.

Abstract: Provided are method and system for applying a prepaid credit to use by a client in his communication activity as well as for managing a prepaying scheme for the client. A client's communication device, for example, wireless communication device of a cellular telephone system or a computer communicating over a computer network such as the Internet, is provided with an activity monitoring unit that holds the client's credit data and applies such credit to permit communication activity by the client through the use of the client's communication device.