Using iPhone SDK, be alerted of new SMS

Is it开发者_开发知识库 possible to be notified programmatically (i'm not sure what sort of notification i require) of a user receiving an SMS?

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AFAIK no, it's impossible.

Documentation quote - In iOS 4.0 and later, you can send text messages from within your application. This feature is strictly for sending messages. Incoming SMS messages go to the built-in Messages app.