Question: In a (U)SIM application using the SUCI API for Java Card, what happens when no object implementing the `SUCICalculator` interface is registered, and the ME sends a GET IDENTITY APDU Command in SUCI context?
Option 1: The (U)SAT framework will invoke a default `getSUCI` method from a predefined library.
Option 2: The USIM shall return the SUCI computed by its own means, according to the USIM configuration.
Option 3: The ME will be notified with an error message indicating no registered calculator.
Option 4: The (U)SAT framework will attempt to register a default `SUCICalculator` object.
Explanation: According to the SUCI API specifications, if no `SUCICalculator` object is registered with the USIM application, the USIM itself will compute and return the SUCI based on its internal configuration when it receives a GET IDENTITY APDU Command in the context of SUCI.