Apple has released a new beta of iOS 6.1.3
for developers.

Dubbed iOS 6.1.3 beta 2, the update is
supposed to fix a hole that can let someone
gain access to your iPhone by sneaking past
the lock screen. Through a small series of
steps, including making an emergency call, a
person could bypass the passcode in order to
make phone calls, listen to voice mail, and
check contact photos.

Apple acknowledged the bug last week.
promised to squash it in a future iOS release.
iOS 6.1.3 will fix that problem...