Question: When GPRS subscription data for a subscriber is modified in the HLR/HSS and the changes impact the data stored in the SGSN, which procedure is **NOT** used to inform the SGSN about these changes?
Option 1: Update Location Procedure
Option 2: Insert Subscriber Data procedure
Option 3: Delete Subscriber Data procedure (for removing impacted PS subscription data)
Option 4: Send Routing Info for GPRS procedure
Explanation: The Update Location Procedure is primarily used to update the UE's location in the network, not specifically for updating or managing GPRS subscription data changes in the SGSN. In contrast, Insert Subscriber Data and Delete Subscriber Data procedures manage (add/modify or remove) subscription data in the SGSN when HLR/HSS changes occur. Send Routing Info for GPRS implies a different purpose, making Option 1 the most clearly incorrect choice for managing GPRS subscription data updates.