These are extensions to the basic profiles defined by specification, but not mandatory. Some devices support them, most don't. They are in various states of development. Some examples are written below:

• The MMAPI (multimedia API) profile provides support for streaming video and audio
• The WMA (wireless messaging API) provides support for, er.., wireless message (SMS, etc)
• The PDA profile provides access to the standard application data manipulated by a PDA device, such as calendars and address books.
• The FCA (File Access API) profile provides facilities to read and write files on devices that have the concept of a file

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