How to update from android 2.3.6 to 4.0 in Samsung galaxy y pro duos

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http://androidforums.com – Hello,everyone this is my first post here ... I need to know that-can i update my Samsung galaxy y pro duos to Android 4.0 from 2.3 ??? And if yes please tell me the procedure !! I have searched every where about how to update but i dint get the correct answer ..... SO PLZ HELP GUYS... THANK YOU (General)