A payment resolution module is configured to communicate with hand-held devices (such as mobile phones, PDA's, or computers) to allow purchase of products using the hand-held devices, without requiring the user of the hand-held device to enter payment information for each transaction. The user of the hand-held device may be identified as the owner of the device either by having the option to enter a personal identification code, or by using a biometric to identify himself, for example. Accordingly, only an authorized user of the hand-held device may use the hand-held device to purchase products. After the payment resolution module receives authorization for payment, an authorization code is transmitted to the mobile device. The user may be required to present the authorization code at the point of sale, such as by entering the code into a computing device at the point-of-sale, prior to completion of the transaction.