Methods, apparatus, and business techniques are disclosed for use in mobile network communication systems. A mobile unit such as a smart phone is preferably equipped with a wireless local area network connection and a wireless wide area network connection. The local area network connection is used to establish a position-dependent ecommerce network connection with a wireless product or service access device supplied by a vendor. A negotiation sequence is carried out to electronically contract the services of the negotiated wireless peripheral from the vendor using a prepaid ecommerce protocol. The negotiated wireless peripheral is a general product or service vending device and the mobile unit acts as a digital authentication and payment device with digital pre-paid payment capabilities. The techniques are useful in many applications to include ticketing and admission systems to events and other types of services that involve ticketing.