This method worked perfectly on nokia n73ME .the
only thing u need is Nemesis service suite v
1.0.38.14
1) Install nemesis
Download nemesis service suite.zip HERE
2) Launch it and click search new device on the top
right corner under the close tab
3) Now click phone info and click scan.
4) After doing this click power mode and select
"test" and press change button
5) Now click "TOOlS" and then "factory settings"
6) Select FULL FACTORY and press reset. Now ur
security code is 12345