Question: In a 5G system, how can a User Equipment (UE) access localized services via a hosting network without a subscription to that hosting network?
Option 1: Through secure authentication and authorization using credentials provided by the home network, with coordination between the home and hosting networks.
Option 2: By purchasing a temporary subscription plan directly from the hosting network's website.
Option 3: Automatically, as all UEs are allowed access to localized services on any hosting network by default.
Option 4: Through a separate registration process outside the 3GPP scope, providing identification information to the hosting network provider.
Explanation: A UE can use its home network's credentials for secure authentication and authorization to access localized services via a hosting network, even without a subscription to the hosting network, leveraging coordination between networks for temporary access.