Hi! I have one 2 years old Nokia 2600 classic. It is superb mobile for those who use mobile just for calling purpose. Battery life is also good. I never had any complaint for my mobile phone yet but two days before my 12 years old son made it locked. Now when I try to open or try to call someone, it asks to enter lock code. I have no information about this lock code. Some of my friend told me that I cannot enter wrong code more than three times because it will block my SIM card. Please inform me. My IMEI number is 358235034362459865875. I need help please help me to get out from this problem.