Question: What does the I-WLAN HPLMN Priority Indication file (EFWHPI) primarily indicate to the Mobile Equipment (ME), and what is the implication of its value being set to '01'?
Option 1: The file indicates the preferred WLAN frequency band, and a value of '01' suggests using the lowest available frequency.
Option 2: The file indicates the selection priority between I-WLAN EHPLMN or last Registered PLMN, and a value of '01' instructs the UE to attempt registration on the last visited cellular network.
Option 3: The file contains WLAN encryption settings, and a value of '01' enables WPA2 encryption for all I-WLAN connections.
Option 4: The file indicates the selection priority between I-WLAN EHPLMN or last Registered PLMN, and a value of '01' instructs the UE to attempt registration on the I-WLAN home network.
Explanation: The EFWHPI file is used for selecting between the I-WLAN EHPLMN (Equivalent Home PLMN) and the last Registered PLMN. A coding value of '01' directs the User Equipment (UE) to prioritize attempting registration on its I-WLAN home network.