to unlock my android 4.1(samsung galaxy neo pocket,GT-5312)

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http://androidforums.com – i have samsung neo pocket smart,i have set screen lock with drawn pattern,but my little boy had done multiple attempt by kidding,now my phone can't be abbleto unlock,i have forget my backup, pin code also,they says that google account username is incorrect,while it is true,what should i do? (General)