Question: When a User Equipment (UE) is registered on its Home Public Land Mobile Network (HPLMN) or one of the specified PLMN Identifications for Service Provider Name display, what is the mandatory display requirement regarding the Service Provider (SP) Name and Public Land Mobile Network (PLMN) Name?
Option 1: The SP Name must be displayed, while the PLMN Name display is optional, configurable via USIM settings.
Option 2: Both SP Name and PLMN Name must always be displayed simultaneously.
Option 3: The PLMN Name must be displayed, with the option to also show the SP Name, as determined by USIM settings.
Option 4: Neither the SP Name nor the PLMN Name has a defined display requirement in this scenario.
Explanation: According to service principles for Service Provider Name indication, when registered on the HPLMN or specified PLMN Identifications, the SP Name shall be displayed. The PLMN Name's display is optional, configurable via USIM settings, highlighting the importance of customizable network settings for user interface experiences in telecom networks.