Apple has released an IOS update today. Although it is only a minor update.
IOS 6.1.4 only appears to effect the iPhone 5 users.
The only description that Apple gives is that it updates the "audio profile for speakerphone."
This can be updated by using the Over-the-Air update through your Software Update on your phone or through the iTunes.
Upon, my experience of the update. It does appear to be a very small update. About 2 MB in size. So the update went flawless and quickly.
Before anyone ask. Since the file was only 2 MB in size and only fixed a very small code in the IOS. No, it does not change anything else that I have seen. Plus, also it does not fix any Voice Over Accessibility for those that want to know. ;)
Lastly, from my observation so far. It does not appear to have broken any functionality.
Just a friendly note. As with any update. Remember to back up your phone first! :)