Technologies underpinning the functionality of mobile payment systems include NFC (Near Field Communication), QR codes, and blockchain technology. NFC enables secure communication between devices for contactless transactions, providing convenience for consumers. QR codes are another means of facilitating quick payments, allowing users to scan codes with their smartphones to complete transactions. Blockchain technology enhances security and transparency in financial transactions, making it increasingly popular in mobile payment applications. Together, these technologies create a seamless, efficient, and secure payment experience for users.