Design guidance

  • Use structure to assist memory and learning
  • Reduce the number of information chunks that need to be kept in mind at any given time, and try not to exceed 5 as the best practice
  • Where hierarchy is used, ensure the current location within the overall hierarchy is always evident and try not to exceed three levels
  • Assist learning and recall through distinctive spatial positions for menu options, and be wary of the potential confusion if these positions change
  • Provide an obvious mechanism that allows users to get back to their previous location or home when navigating any menu structure
  • Consider the memory implication of unseen content if scrolling is required to obtain more menu items
  • Support learning by ensuring that all possible actions generate suitable feedback that guides the user
  • Try to ensure all actions are easily and immediately reversible, and try to constrain the availability of actions that would result in undesirable or irreversible outcomes
When trying to use the phone when the keypad is locked, a message explaining how to unlock the phone is shown.

Helpful feedback is provided if the user attempts to press buttons while the keylock on this phone is active