If you own an iPhone 5, you'll soon be seeing the iOS 6.1.4 update show up if you haven't already. The update appears to only be for iPhone 5 users and contains an update to the audio profile for speakerphone.
If and when we find out more about the update, we'll update accordingly. Have you installed iOS 6.1.4 already? Notice any differences? Be sure to let us know in the comments!