THE SOLUTION can be found at
App Brain
Quotith I: "*Some Jelly Bean phones has locked-down the WiFi hotspot feature, because of that FoxFi will ask you to install a user certificate on those phones. The side effect is that Android system will require you to set a screen lock (and only allows Pattern, PIN or Password) when any security settings is changed. There is indeed a way to remove the lock screen while keeping the certificate: set a pattern lock and try to unlock the phone with a "bad pattern" for 5-10 times, it will show you an error message, now select "Forgot Pattern?" and enter your gmail/password. After these steps the screen lock will be removed without removing the certificate."
The error message shows up as text at bottom center. You have to be quick entering your email and password or it times out.
Thanks to
