Apple started sending notifications about its late beta version of iOS 6.1 to developers. The build available to registered and approved developers and it is called iOS 6.1 Beta 4 (build number 10B5126b). Beta 4 comes some 2 weeks after Beta 3 (released on December 3rd) and it is available for almost every Apple device including most iPhones and iPads, but Apple TV is not included. The Apple TV version will follow shortly. 

There is no word about possible fixes and when the final version might hit the channel, but its good to know that Apple is keeping busy.

One can only speculate about the final feature set of iOS 6.1 and when the final version comes out, but there is a big chance that Apple might wait to see the alleged jailbreak that might show itself up next week, and later patch this vulnerability in the release candidate golden version of iOS 6.1 as well as in the final one.

The beta is out and in case you are a developer or know one, or have access to some forum that might have the leaked one, you might go for it. Let us know if you tried this one and if you have discovered some new features.

You can get more here.