How to access incoming SMS details

I'm developing a开发者_如何学运维n application to identify incoming messages (SMS) and makes a file (on the iPhone) and write information about the SMS into it. I've read about a spy-ware that did this link

If they have done this, it means it can be done by others. People keep saying "Do it for jailbreak". My question is is there any way to do this without jail breaking the phone. If no, then is there any tutorial that can guide me through this process on Private APIs.

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Only way to gain access is to jailbreak your iphone. This is however is NOT recommended and is no way endorsed by me and maybe illegal etc

Also only other jailbreak users would be able to use your app.

I would seriously consider whether this is something you want to do!

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No, it can't be done with any public APIs.

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Applications have no access to the SMS functionality of the iPhone.

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we cant access sms from phone