Question: What is a key principle for the activation of services from the User Interface (MMI) perspective, as per human factors and user procedures in telecom networks?
Option 1: Activation of services should require a minimum of 3-4 steps to ensure user engagement.
Option 2: Services should be activated through a single, universal button across all devices.
Option 3: Activation processes must prioritize aesthetic appeal over simplicity.
Option 4: Activation of services should be as simple as possible with minimum input expected from the user.
Explanation: This principle is crucial for enhancing user experience, especially in diverse, global telecom environments. By minimizing user input for service activation, the interface becomes more accessible and user-friendly, catering to a broad range of capabilities and preferences. This simplicity is key to effective human-machine interaction in telecommunications.