Question: In a roaming scenario, where do Charging Data Records (CDRs) related to the same PDP context potentially get sent?
Option 1: Always to a single Centralized Charging Gateway Function (CGF) in the home network.
Option 2: Only to the visited network's CGF for consolidated billing.
Option 3: To different networks' CGFs, necessitating cost balancing agreements between UMTS Operators.
Option 4: Directly to a universally agreed upon third-party billing aggregator.
Explanation: In roaming scenarios, CDRs for the same PDP context can be split between different networks (e.g., home and visited), necessitating agreements between UMTS Operators for cost balancing of roaming traffic, highlighting billing complexity in telecommunications.