Question: During a location update procedure in framed operation, what condition must be met for the HLR to send subscriber data to the VLR or SGSN for services requiring support indication?
Option 1: The VLR or SGSN must have previously stored relevant subscriber data.
Option 2: The HLR and VLR/SGSN must both support the Super-Charger functionality.
Option 3: The VLR or SGSN must have indicated its support for the service (or specific phases of the service) in the subscriber data request.
Option 4: The framing operation must explicitly request all stored shared subscriber data.
Explanation: For services that require the VLR or SGSN to indicate their support, the HLR will only send subscriber data if it receives this indication in the subscriber data request. This ensures that data is not sent unnecessarily to nodes that cannot utilize it, optimizing network resource usage and service provisioning.