A method of processing a transaction for provision of funds to a mobile telephone prepayment account associated with a mobile telephone is disclosed. The method includes: an Automated Teller Machine (ATM) receiving, from a card associated with a user of the mobile telephone, information identifying a financial account associated with the user of the mobile device; the ATM receiving, from a user, an identifier associated with the mobile telephone; the ATM receiving, from the user, information indicating an amount of funds to be provided to the mobile telephone prepayment account; and the ATM sending, to a financial institution associated with the financial account, an instruction to transfer the indicated amount of funds from the financial account to the wireless service provider, so as to provide the indicated amount of funds to the mobile telephone prepayment account.