Question: In a USIM's Phonebook application, according to 3GPP specifications, what is the formatting rule for multiple records within an EFPBR file containing more than one type of contact information (e.g., email, phone number)?
Option 1: Each record can have a unique format based on the type of contact information it contains.
Option 2: All records must be formatted identically for each type of contact information present across all records in the file.
Option 3: The first record determines the format for all subsequent records, regardless of the contact information type.
Option 4: Files with multiple types of contact information are not supported within a single EFPBR record.
Explanation: This is because, as per specified restrictions for phonebook management in USIM applications, if an EFPBR file contains more than one record, all records must be formatted identically on a type-by-type basis, ensuring consistency and simplifying data management within the phonebook application.