A free program for Android, by Elade Forwa.

USSDSA is the official application from the mobile operator in South Africa that allows you to access all the services offered by USSD and other networks. It offers a simple interface that’s easy to use. It’s designed to work with the phone on which the service is offered. The app doesn’t require any special memory to work, so it’s ideal for users with low-end devices. It can work on all networks that offer the service, including Vodacom, MTN, Cell C, Telkom, and many more. It can also work on Android devices.

USSDSA is an application that allows you to request Callbacks from other contacts on a particular network. It doesn’t require any special memory.