Is there anyway to undo the backup restore that itunes does for your Iphone?

I got a new iPhone 4s under warranty after my old was damaged. I started fresh and started to input numbers myself as well as apps. I just plugged it into iTunes and now all of my old stuff is back on my new phone. Contacts, pictures, etc. Is there anyway that I can undo the backup restore iTunes did to my phone and go back to how I had it before I plugged it up?

You can try PC Suite if you have iPhone 4S jailbroken
http://download.pandaapp.com/ios-iphone-app/91-pc-suite-for-iphone-2.9.72.360-id22578.html