Question: What happens when a User Prompt Indicator IE is received without a corresponding object IE in an SMS, according to 3GPP specifications?
Option 1: The receiving entity (ME) will prompt the user to accept or discard the non-existent object.
Option 2: The ME will automatically discard the User Prompt Indicator IE and continue processing other IEs.
Option 3: The SMS will be rejected, and an error message will be sent back to the sending entity.
Option 4: The User Prompt Indicator IE shall be ignored, but the rest of the SMS content will be processed normally.
Explanation: According to the specifications, if a User Prompt Indicator IE is not followed by a corresponding object IE, it (the User Prompt Indicator IE) shall be discarded. This implies that the receiving entity simply ignores this particular IE without affecting the processing of other potential IEs in the SMS or prompting any user interaction for a non-existent object.