Information on how much free memory is left in the phone, and how much is used on different files and applications.
Accessory that is used in order to keep your hands free while having a mobile phone conversation. See also car handsfree.
Function that inactivates radio transmitters and receivers so that some functions can be used in places such as planes and hospitals.
Folder structure which makes it easier for you to organise your files (pictures, web pages, games, etc).