I have discovered another security flaw in Samsung Android phones. It is possible to completely disable the lock screen and get access to any app - even when the phone is "securely" locked with a pattern, PIN, password, or face detection. Unlike another recently released flaw, this doesn't rely quite so heavily on ultra-precise timing.
read more........http://shkspr.mobi/blog/2013/03/new-bypass-samsung-lockscreen-total-control/
read more........http://shkspr.mobi/blog/2013/03/new-bypass-samsung-lockscreen-total-control/