Here, I propose a solution to reset your password for samsung mobiles. This method will enable you to reset password for mobile tracker as well as phone security code. Here’s the procedude.
Turn off your phone.
Remove sim card and then turn on your phone again.
Type in *2767*782 # or *2767*782 # on your phone’s home screen.
Wait for the phone to reboot automatically.
Now turn on your phone but with a sim card this time.
Goto menu » settings » security » phone lock and change your password.
Please note that default password is 00000000 or 0000