While the original instructions were posted to a OnePlus 3 forum within XDA Developers forums, there's no part of the process that is entirely unique to the OnePlus 3. (slashgear.com)
As of this writing users at XDA Developers forum are now reporting that their XZ are sporting the latest and greatest Xperia UI so far. (techtimes.com)
Users reported on XDA Developers forum that the update is now available for the Indian version Galaxy S4 and it is live as over-the-air (OTA), however, users can also download the update via Kies. (techone3.in)