This feature is not on a current W3C standards track, but it is supported on the Firefox OS platform. Although implementations may change in the future and it is not supported widely across browsers, it is suitable for use in code dedicated to Firefox OS apps.
onstksessionend property specifies an event listener to receive
stksessionend events. These events are notified whenever STK Session is terminated by ICC.
navigator.mozMobileConnection.icc.stksessionend = funcRef;
funcRef is a function to be called when the
stksessionend event occurs.
Not part of any specification.