Well I don't think any1 else has answered yet,so ill help.If you changed the lock code already then its going to be tough to unlock it.but the simple part is,if you havnt ever changed your lock code(it shud be a 4 digit code) then its the last 4 digits of your fone number.if you changed it and forgot,I can't help you.it happened to me once,but it wuz different because my girl best friend randomly typed,but she found it out.so if you havnt changed it,last 4 number,if you have,can't help you.sorry.