CreativeSolutions Message Protector v3.0.5 S60v3/S60v5/S^3 SymbianOS9.x Signed.
Thus you can keep all your private messages inside inbox, outbox, draft, sent messages and emails safe and secure,
and your private messages can't be accessed by others.
Also it supports master lock which helps you to lock main screen of your phone,
thus nobody can use your phone without knowing valid password.
More user friendly and easy to use security app.