Thanks for your anwser!

I was talking about this sticky thread specificly about N9:
http://forums.internettablettalk.com...ad.php?t=82693

Also, I came across this link:
http://www.meegoexperts.com/2011/07/securing-nokia-n9/

There is a screenshot that shows only-digit keypad when asking for security code! Is there anyone who uses this feature to verify it?