How to take backup of iphone 3G when passcode is not correct?

I have bought iphone 4G. My all contacts and some more database is in my apple 3G phone. But I don't know the passcode of my apple 3G. Now how can i transfer my database of my apple 3G to my new apple 4G

There's no way to access or backup unless you have the correct passcode.
If your iphone is jailbroken you may find a way.

Try to use "iPhone Backup Unlocker", it will help you!

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