Question: How should a Mobile Equipment (ME) handle Message Waiting Indication (MWI) when memory is limited on the Subscriber Identity Module (SIM)/Universal Subscriber Identity Module (USIM)?
Option 1: Reject MWI short messages if SIM/USIM memory is insufficient.
Option 2: Automatically delete oldest call records to free up space for new MWI.
Option 3: Accept and acknowledge MWI short messages regardless of available SIM/USIM memory.
Option 4: Prompt user to manually manage SIM/USIM storage before accepting MWI.
Explanation: To ensure seamless service continuity, the ME is required to accept and process Message Waiting Indications without being hindered by storage constraints on the SIM/USIM. This approach prioritizes the timely delivery of status updates to the user, aligning with the principle of maintaining service availability across various operational scenarios, including power cycles or SIM/USIM reinsertions.