Question: During a dual-radio Access Transfer in IMS, if the MSC Server assisted mid-call feature is used and the UE has multiple active bi-directional sessions, which sessions are retained by the UE?
Option 1: All active bi-directional sessions are retained.
Option 2: Only the two most recently active bi-directional sessions are retained.
Option 3: The oldest active bi-directional session and all inactive sessions are retained.
Option 4: The UE releases all sessions except for the least recently active bi-directional session.
Explanation: According to IMS Access Transfer procedures, when the MSC Server assisted mid-call feature is utilized during a dual-radio transfer with multiple active bi-directional sessions, the UE prioritizes retaining connectivity by selecting and retaining the two most recently active bi-directional sessions, releasing all other sessions for seamless continuity of recent communications.