As we know the final version of iOS 6.1.3 has been released. If you have upgraded your iPhone to iOS 6.1.3, then you must be thinking whether it is jailbreakable or not. MuscleNerd has recently confirmed that evasi0n will not work on iOS 6.1.3 as Apple has patched jailbreak exploits in the new version of firmware. Now the good news is that you can jailbreak iOS 6.1.3. Redsn0w 0.9.15b3 can be used to jailbreak the new version of firmware on iPhone 4, iPhone 3GS and iPod touch 4G.
Unfortunately iPhone 5 users will not be able to jailbreak the new version of firmware. If you are a user of iPhone 5, then you should avoid installing the new version of firmware on your device. iPhone 4, iPhone 3GS and iPod touch 4G users can install iOS 6.1.3 without any problem because they can use Redsn0w 0.9.15b3 to jailbreak iOS 6.1.3. You should note that this is a tethered jailbreak, so you have to connect your iOS device to the PC every time you restart it. This version of Redsn0w does not support iPhone 4S, iPhone 5, iPod touch 5G, iPad mini, iPad 4, iPad 2, and iPad 3. If you are a user of one of the above devices, then you have to wait for some more time to jailbreak iOS 6.1.3. It is expected that evad3rs dev team will release a new tool to jailbreak iOS 6.1.3 untethered. You have to wait until the release of the new jailbreak tool.
As we know the new version of firmware has fixed several bugs in iPhone, so you can install it on your iPhone 4, iPhone 3GS or iPod touch 4G. This version of iOS has fixed passcode security bug of iPhone users, so no one will be able to bypass your lock screen password. If you are a Japanese iPhone user, then you can see the improvement of Maps app after upgrading your iPhone to iOS 6.1.3.