The CTSY Dispatcher shall invoke this function on receiving the EMobilePhoneGetCurrentActiveUSimApplication request from the CTSY.

It is a request call that is completed by invoking CCtsyDispatcherCallback::CallbackPhoneGetCurrentActiveUsimApplicationComp()

Implementation of this interface should retrieve the AID of the current active USIM application. (There is only ever at most one USIM application active at a time)

RMmCustomAPI::GetCurrentActiveUSimApplication()