It's a piece of software code that gets placed on your BlackBerry device to enable certain features, or provide certain functionality.
For example, an MMS service book would be put on your device to allow your device to send/receive MMS message.
There's service books for numerous things... such as email, calendar, browser, IM, etc.
Last edited by penguin3107; 06-30-2008 at 01:33 PM..
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