Question: In a shared E-UTRAN network, what is a prerequisite for a User Equipment (UE) to support per Public Land Mobile Network (PLMN) CDMA2000 interworking?
Option 1: The UE must support LTE Advanced Pro features.
Option 2: The UE must be connected to a 5G New Radio (NR) cell.
Option 3: The UE must support either CDMA2000 1xRTT or CDMA2000 HRPD.
Option 4: The UE must have a specific RRC protocol version.
Explanation: For a UE to utilize per PLMN CDMA2000 interworking in shared E-UTRAN networks, it must first be capable of communicating over the CDMA2000 network, which implies support for either its 1xRTT (voice-centric) or HRPD (data-centric) technologies, highlighting the importance of backward compatibility and intertechnology roaming in heterogeneous wireless environments.