Return to stock without Odin

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http://androidforums.com – My phone is refusing to be recognized by my computer (I get the "USB devise malfunctioned" notice), which, of course, makes it impossible to use Odin. I need to return my phone to stock in order to sell it. I tried flashing the "FA19.zip" file in CWM, but got a MD5 mismatch error. Any ideas??? (General)