Solution: This can only be solve using a GSM gadgets. I use UST pro II.
Procedure:
1. Open UST pro. Select E2120. Uncheck bypass in TAT mode (new).
2. Connect data cable connecting the phone and the gadget.
3. Click read code and immediately power on the phone be use you have a full charge battery.
4. Wait for the program to finish.
5. Disconnect cables and samsung phone.
6. Turn on the mobile phone.
7. Insert the code. In this case I enter the code =86990430.
8. Phone will boot and Phone code is remove now.
Screenshot:
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