iOS 6.1.3 has been released by Apple

  A few moments ago Apple Lossless Audio CODEC (ALAC), has launched iOS 6.1.3 for iDevice owners, the new version of the operating system solving the bugs that allowed the LockScreen Passcode to be removed, bringing some news for Apple Maps-s from Japan and blocking the solution of untethered jailbreak evasi0n. The new version of iOS is available for all iDevices, but if you have already jailbroken with evasi0n you will not see any Software Update available in your terminal.

UPDATED: You can download iOS 6.1.3 from here.