Updated! The fourth version of iOS 12.1 has been released to developers.
So soon after Beta 3, Apple has released the fourth beta of iOS 12.1 to Developers and the Public Testing Program. At the time of writing, no major changes or removals have been found. We'll update the article if any have been spotted.
iOS 12.1 brings over 70 new emojis, eSIM Support for the iPhone XS and brings back Group FaceTime. There are also performance improvements too and fixes for issues with the newest iPhones.
You can grab iOS 12.1 Beta 4, if you're a developer or public program tester, by going to Software Update in Settings.
UPDATE 1: Corrected major error in title, fixed links. Sorry! UPDATE 2: Apple has released iOS 12.1 Beta 4 to the public beta program. UPDATE 3: New bagel emoji with B4.