Rather than logging out, you can lock your phone. You can either lock your phone manually using the steps below or have it automatically locked after a period of phone inactivity. To use the lock feature you need to set a security PIN (you can lock the phone with a code but anyone can also unlock it).
When your phone is locked:
You can only use the phone to make internal and emergency calls.
You cannot access the phone menus for your user settings.
To unlock your phone, click Unlock. If you have a login code set, you need that code to unlock the phone. If you do not know your login code, contact your system administrator.