M-commerce refers to any e-commerce done via wireless devices like mobile phones. It allows customers to access information, goods, and services anytime and anywhere. Early applications focused on information delivery, but future focus will be on revenue generation through mobile transactions, entertainment, communications, and information services. Security and appropriate payment methods are important from the customer and provider perspectives to enable widespread adoption of m-commerce. As mobile and wireless technologies continue advancing, m-commerce has the potential to replace technologies like ATMs and credit cards by delivering financial services on mobile devices.