Question: In a 5G system, what is a key condition for enabling traffic steering and/or switching of a DualSteer device’s user data across two 3GPP access networks belonging to **two different** Public Land Mobile Networks (PLMNs)?
Option 1: Simultaneous transmission capability of the DualSteer device
Option 2: Data anchoring in the Visited PLMN (VPLMN)
Option 3: A business/roaming agreement between the PLMN operators and data anchoring in the Home PLMN (HPLMN)
Option 4: User Equipment (UE) support for only one Radio Access Technology (RAT)
Explanation: For traffic steering and/or switching across two 3GPP access networks belonging to two different PLMNs, the presence of a business/roaming agreement between the operators is crucial for interoperability and billing purposes. Additionally, data anchoring in the HPLMN ensures that the primary network controls and manages the user's data sessions, even when traffic is steered or switched across networks. This setup facilitates seamless service continuity and efficient resource management.