Question: Which command related to the Universal Subscriber Identity Module (USIM) application is defined by an external profile with a specific instruction code (INS '1B')?
Option 1: GET RESPONSE command for retrieving data from the USIM
Option 2: UPDATE BINARY command for updating binary files in the USIM
Option 3: READ RECORD command for accessing specific records on the USIM
Option 4: GET IDENTITY command as utilized in OMA BCAST Smart Card Profile
Explanation: The correct answer is Option 4 because the OMA BCAST Smart Card Profile defines a command using INS '1B', associated with the GET IDENTITY command for USIM applications, highlighting interaction between 3GPP specs and external profiles for specialized functionalities.