In a cellular network system, an add-on base station (43) including: A. a first channel (51) for connecting to a customer's phone; B. a second channel (52) for connecting to a network; C. circuits for connecting (53) the customer's phone to a destination on the network; and D. billing means (55) for collecting a payment for services related to connecting the customer's phone to the network. The customer's phone may be connected through a wireless link, the network may be an IP network, such as the Internet, and the payments may be in the form of digital documents, such as tokens, digital cash or credit.