Question: In a 5GS environment, how does a Mobile Equipment (ME) determine the display of a service provider's name when registered to a PLMN, as per EFOPL5G file specifications?
Option 1: The ME solely relies on network names received during registration and its internal list, ignoring USIM application files.
Option 2: The ME uses both text format from EFPNN and graphical format from EFPNNI, based on predefined rules, in association with the EFOPL5G file.
Option 3: The service provider name is always displayed using a default setting stored within the ME's firmware, regardless of USIM application files.
Option 4: The ME prioritizes the use of EFPNN (or EFPNNI for icons) as indicated by EFOPL5G, over any network name stored internally or received during PLMN registration.
Explanation: According to specifications, when EFOPL5G is present, the ME uses this file with EFPNN (and optionally EFPNNI) to display the service provider's name, taking precedence over internal or registered network names, ensuring a specific operator name for NG-RAN TAI identities.