mPAY is the first mobile payment service in Thailand, developed and maintained by AIS. It is a safe and convenient way to transfer money 24x7, anytime and anywhere. mPAY allows users to pay through their bank account using their own mobile number. mPAY also allows users to transfer money from one wallet to another, regardless of whether the recipients are also mPAY users. This is not only for payment but also for transfer of money.

The service is highly secured with a code and password. This code is used to log in to the service, while the password is used to confirm the transaction.