Apple has released the first beta of iOS 7.1 to registered developers for testing purposes. The update can be downloaded via Apple's developer center. The beta arrives as build number 11D5099e. Apple also released a new Apple TV beta.
Late last week, Apple released iOS 7.0.4 to all users, fixing an issue with FaceTime calls.
Article Link: Apple Seeds First Betas of iOS 7.1, Apple TV Software to Developers