Question: What is a prerequisite for a User Equipment (UE) to support Downlink (DL) channel quality reporting of the serving cell in Msg3?
Option 1: The UE must be operating in TDD (Time Division Duplexing) mode.
Option 2: The UE must support ce-ModeA-r13.
Option 3: The UE has to be connected to a cell with a specific carrier frequency.
Option 4: The UE needs to have an established Dedicated Bearer.
Explanation: For a UE to support DL channel quality reporting of the serving cell in Msg3, it is mandatory that the UE supports ce-ModeA-r13, enabling detailed reporting for network optimization and user experience enhancement.