Galaxy S II i9100 Bricked

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http://forum.xda-developers.com – Hello I recently tried to install Cryogenmod 10 using Clockwork Mod Recovery, my friend recommended doing it this way. My phone now just boots to the Samsung logo screen and sits with that yellow "!" icon. I've changed my mind about installing a custom rom and just want to go back to my factory OS. Can you guy's please help me do this? Thank you so much. (HowTos)