Question: In a Mobile Equipment (ME) with Service n°25 'allocated and activated', what action is taken when receiving a Cell Broadcast (CB) message with an identifier matching one in EFCBMID?
Option 1: The ME discards the CB message and alerts the user via SMS.
Option 2: The ME passes the CB message to the SIM using the ENVELOPE command.
Option 3: The ME stores the CB message locally without notifying the SIM.
Option 4: The ME initiates a voice call to a predefined number for further instructions.
Explanation: According to the specified behavior for Service n°25 being 'allocated and activated', when the Mobile Equipment (ME) receives a Cell Broadcast (CB) message with an identifier that matches one in the EFCBMID, it is mandated to forward this CB message to the Subscriber Identity Module (SIM) utilizing the ENVELOPE command. This ensures seamless integration and processing of the received broadcast message between the ME and SIM, highlighting the importance of coordinated handling of cell broadcast services in telecom networks.