Question: In a USIM application, what determines the structure of the EFMMDF (Multimedia Messages Data File) containing Multimedia Messages data under DFMULTIMEDIA?
Option 1: The type of service (e.g., service n°67) availability
Option 2: BER-TLV (Basic Encoding Rules - Tag, Length, Value)
Option 3: MMS Implementation's encoding rules
Option 4: MM Content Data Object's coding definition
Explanation: The structure of EFMMDF is defined by BER-TLV (Basic Encoding Rules - Tag, Length, Value), highlighting the importance of standardized encoding rules in telecom networks for efficient data storage and retrieval.