Question: In a USIM's EFEHPLMN (Equivalent HPLMN) file, as per 3GPP specifications, what is the composition of each EHPLMN entry in terms of coding structure?
Option 1: Mobile Network Code (MNC) followed by Mobile Country Code (MCC), coded according to GSM standards.
Option 2: A combination of Location Area Code (LAC) and Cell Identity (CI), as defined in UMTS protocols.
Option 3: An IMSI-derived code with a prefixed Network Identifier, based on LTE specifications.
Option 4: Mobile Country Code (MCC) followed by the Mobile Network Code (MNC), coded according to mobile radio interface layer 3 specification standards.
Explanation: The correct composition of each EHPLMN entry is defined as starting with the Mobile Country Code (MCC) followed by the Mobile Network Code (MNC), ensuring interoperability and consistency across different networks and technologies within the telecom domain.