Abstract: The present invention describes a docking module for a cellular telephone which allows the cellular telephone and docking module to function as a secure point-of-sale system to accept payment via credit card, debit card, ATM card, stored value (Gift) card, phone card, as either magnetic swipe cards or IC cards, for sales or service transactions, as well as activate or recharge phone cards, activate or recharge stored value (Gift) cards, and activate or recharge IC cards. The secure point-of-sale system will also perform check validation sequences that will allow checks to be safely accepted for sales and service transactions. The docking module includes a docking module control assembly with a microprocessor that controls a magnetic credit card reader, an IC card reader/writer, a thermal docket printer, a multifunction security access module (SAM) and battery.