Remove Phone Lock for GT samsung phone

Well, i got my phone lock recently. so i dive to the internet to find the solution.

the most promise solution is this one.

1. put your sim card into the phone.
2. power up the phone.
3. use SOS call.
4. hold down lock function button at side of your phone. then select keypad. 
5. type in *2767*2878#. then release the lock function.
6. wait SOS call to hang up itself or u can hang up by using the button there.
7. if u correctly enter the code, it will show u number like this on the screen : *2767*----#. then the phone will restart to clear user previous setting/profile. 

be very careful, it doesnt erase sms, picture, call logs and so on. only previous setting will be affected. so, if u find stolen items and such thing have sensitive data, pls have respect and delete for them.

proven by me. samsung gt c3260.