Callback Application


When subscribers are abroad in roaming they seek for cheaper calls. This is where Callback application come into place. The Callback applet is a SIM Card based Java applet, which helps the home MNO to trigger calls from the server side automatically or by manual triggering using cheaper networks, every time a subscriber is in roaming and wants to place a call to a counter party.

The Card Centric Callback applet uses the standard Javacard framework, which means it will be interoperable on any Java Card supporting the Javacard Sim API.

Callback Application Specifications