Question: When the `+CVMOD` command sets the voice call mode to `CS_PREFERRED` for a Mobile Originated voice call, what action does the ATD command take, considering operator preferences?
Option 1: The ATD command always makes a CS (Circuit Switched) mode call, ignoring operator preferences.
Option 2: The ATD command gives preference to CS but switches to VoIP if the operator has set VoIP as the preferred mode for UE originated calls.
Option 3: The ATD command checks for an available SIP VoIP session before attempting a CS call, regardless of operator settings.
Option 4: The ATD command's preference for CS is overridden if the operator has specifically set preferences for UE originated calls/sessions.
Explanation: If the operator has set preferences for UE originated calls/sessions, these preferences take precedence over the UE's settings, such as `CS_PREFERRED` set by the `+CVMOD` command. Thus, the ATD command's default action based on the `CS_PREFERRED` setting would be overridden by the operator's specified preferences.