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Note: You might have to root your phone for this to work.
You can hack any phone's lock pattern using this method. To reset android lock pattern, you don't need a computer. You can do this from within the phone itself. This method is different from the adb method.
You can use this method
1. If you forgot your lock pattern
2. If phone got locked due to excessive number of filed attempts.
3. If someone changed your pattern without your information