Google's worst-kept secret is the upcoming Android 4.3 update for devices powered by its mobile OS (though a lot more secrets have come to light recently), and we're starting to see that update make its way to the handsets of owners who aren't afraid to experiment. SamMobile reports this morning that Android 4.3 has been spotted on both the Google Play Edition and the Snapdragon-powered Galaxy S4, and should work fine on both for users who aren't afraid to mess around with flashing their ROM and voiding their warranty.More...