Apple released the iOS 6.1.3 update today, and it brings bug fixes for the well-known passcode bug, which allowed users to bypass the lock screen security. In the same time, the new update offers minor enhancements in the Apple Maps app in what concerns the Japan region.
With the iOS 6.1.1 revealed back in February, many iPhone users noticed the possibility to trick the lockscreen passcode in order to access important files and data. In this respect, Apple was trying to fix the problem by releasing the new iOS 6.1.3 update. However, I have to mention the fact that only some users encountered this passcode problem. For those of you who do not want to fix the Passcode bug, then, there is not need to upgrade your device yet since it does not offers any other changes.
In what concerns the mapping system in Japan, the new iOS update brings minor improvements and enhancements for some regions. As you know, Apple previously releases a Japan Maps fix over-the-air with iOS 6.1.3 beta version, but the final update offers even more improvements. Now, users are able to see a more accurate and detailed view for some regions in Japan.
Apparently, all new iOS devices are able to upgrade to iOS 6.1.3. If you want to upgrade your device, then you should go to the Settings menu, in the Software Update tab and start upgrading your device. In case you are not able to see the upgrade available in the Software Update section, then you should head to iTunes and start updating over-the-air.
As you know, the new iOS update was supposed to patch Evasion exploits needed in order to perform an untethered jailbreak. The new iOS 6.1.3 contains multiple undisclosed security patches, and it does fix the vulnerabilities needed to make jailbreak possible. Therefore, if you want to continue to rely on a jailbroken device, then you should not upgrade your device to iOS 6.1.3.
iOS 6.1.3 IPSW Direct Links