Question: In a 3GPP UICC application, what is the primary purpose of the 'X-3GPP-Multimedia' vCard Type in the Contact Manager Server and External Client?
Option 1: To store unique identifiers for contact groups
Option 2: To specify SIP URIs for voice communications
Option 3: To indicate the type and URL of multimedia elements (e.g., RINGTONE, VOICETAG, VIDEO)
Option 4: To encode email addresses for instant messaging
Explanation: The 'X-3GPP-Multimedia' vCard Type is defined to indicate the type of multimedia elements (like RINGTONE, VOICETAG, VIDEO) and provide their URL, which could be within the UICC Multimedia File System or an external location, aligning with managing and referencing various multimedia content in a contact's vCard entry.