Question: In a Telecommunication network, what is the primary purpose of indicating 'Inter-UE Transfer' in a Charging Data Record (CDR) for IMS (IP Multimedia Subsystem) services?
Option 1: To signify a successful handover between different Radio Access Networks (RAN) for seamless service continuity.
Option 2: To indicate a change in the User Equipment's (UE) IP address due to mobility within the same RAN.
Option 3: To show that a call was forwarded from one UE to another due to unavailability of the original recipient.
Option 4: To denote a transfer between different IMS services on the same UE for enhanced service experience.
Explanation: The correct answer highlights the primary purpose of 'Inter-UE Transfer' in the context of IMS service continuity, indicating a seamless handover or transfer between different UEs to maintain uninterrupted service.