USSD, is a service that allows mobile phone users to engage with a distant application in real-time from their handset. When a user calls in, a pre-defined session is initiated to let your application and the user exchange information. It does not require internet access and can be used on both feature phones and smartphones.
This is a three-digit code, such as *144#, that is used by a single user for their business or service.
This code is shared by several businesses or services. Each business is assigned a channel on our dedicated codes, such as *144*14#