A system and a method for using a portable consumer device such as a mobile phone are disclosed. In one embodiment, a method according to the present invention comprises referencing data regarding an individual consumer stored as part of a payment processing network to generate an electronic coupon targeted to the individual consumer. The electronic coupon is transmitted to a mobile device of the individual consumer over a communications network, and purchase transaction utilizing the electronic coupon is processed over the payment processing network. In certain embodiments, the electronic coupon may be generated based upon temporal and/or geographic information of a prior purchase transaction conducted using the payment processing network.