Question: Under what condition(s) is voice call continuity for emergency calls **NOT** performed in a single radio or dual radio User Equipment (UE)?
Option 1: When the user is stationary within coverage of the source network.
Option 2: When the target network does not support emergency calls, but supports voice call continuity.
Option 3: When the source and target networks belong to different operators, but both support voice call continuity for emergency calls.
Option 4: All of the above (i.e., if any one of these conditions is true: user stationary within coverage, target network doesn't support emergency calls, or source/target networks have different operators)
Explanation: Voice call continuity for emergency calls is only performed under very specific conditions. If any of the following are true, it is not performed: The user is not moving out of coverage (stationary within coverage). The target network does not support emergency calls, regardless of its voice call continuity capability. The source and target networks belong to different operators, which violates one of the required conditions for performing voice call continuity. Thus, if any of these scenarios occur, voice call continuity for emergency calls will not be performed.