Question: In SMS according to 3GPP specifications, what is the primary purpose of the 'Real Name' field in a Short Message Service (SMS) message, and where is it utilized?
Option 1: To identify the recipient's device type, used in both MO (Mobile Originated) and MT (Mobile Terminated) messages.
Option 2: To authenticate the sender's location, exclusively used in MT messages.
Option 3: To display the sender's actual name, used only in MO (Mobile Originated) messages.
Option 4: To specify the message priority, utilized in both MO and MT messages for routing purposes.
Explanation: The 'Real Name' field is designed to contain the sender's actual name and is only utilized in Mobile Originated (MO) messages, enhancing the recipient's ability to identify the sender beyond just a phone number or ID.