Question: What is NOT a primary reason for collecting charging information in 3GPP-compliant telecom networks, according to service aspect standards?
Option 1: Interworking with earlier releases (e.g., Release 98) for seamless billing integration.
Option 2: Detailed itemised billing to provide transparent user expenditure breakdowns.
Option 3: Error analysis in signalling flows (e.g., incomplete or erroneous call setup).
Option 4: Fraud management procedures to detect and prevent unauthorized network use.
Explanation: The collection of charging information due to errors in signalling flows (such as incomplete or erroneous call setup) is explicitly stated as NOT being required. In contrast, the other options (interworking with earlier releases, detailed itemised billing, and fraud management procedures) are all listed as supported purposes for collecting charging information, highlighting their importance in telecom network operation, billing, and security.