New answers tagged password
There's an app named User Management for what you are asking. But, the app requires root access to work. So, your device needs to be rooted (which voids warranty).
On recent versions of Android (since 4.3, at least) you have to set a password as your device unlock method. If you have a pin or pattern unlock configured, it seems that there is no way to access VPNs. Dumb, but it is what it is. Just go to settings > security > screen lock, and choose password.
Look in Settings -> Security -> Owner Info. It is the only one place, to my knowledge, where you can set up text under the clock on the lockscreen before 4.2.
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