You can now protect your phone with private password.if anybody try to enter your application on your phone,the application will display input password..

Here is how to do it,first download this application locker crazylocker.sis

That application is for symbian.then launch the application.it will ask you to put any password you want,then put the password only you can know.

Then save.so whenever you or somebody try to open applications on your phone,that crazylocker will bring not one box to enter the password b4 you can now enter into any application..

For those that did not have symbian,download the crazylocker and use minihalo to convert it to jar.

Here is minihalo  - minihalo.jar