Update: The fourth beta of iOS 12.3 has now been released to the public. For those in the Apple Beta Program (link below) you should have it available to download and install.
Apple has released the fourth beta of iOS 12.3 to registered developers today. The new update continues to refine the build as Apple prepares it for a May release. For those with developer programs and who have registered iPhones or iPads in the program, you can download this new build by going to Settings>General>Software update on your device.
This new build comes a week after the third beta was released last week.
At the time of this article, the new beta of iOS 12.3 was not available to those registered in the Apple Beta Program. That public beta program should get the new build either late today or tomorrow.
Overall, this release of iOS is more about bug fixes and performance improvements. The notable exception is the new Apple TV app. It made its appearance in the second beta and no noticeable changes have been made to it in this update.
As most readers will know by now, the updated Apple TV app will be the future home of Apple TV+ when it is released later this year. The new app brings a new “for you” section that makes it easier to find new content you may want to watch. It also brings integrations with multiple network providers in the new Channels section. There you can access CBS All Access, Starz, Showtime, HBO, Nickelodeon, Mubi, The History Channel Vault, and Comedy Central Now without having to open those other apps. It is here that subscriptions to services will also be available when iOS 12.3 is released to the public.
The release of iOS 12.3 should happen in May, just before WWDC in June. At WWDC, iOS 13 should be announced and that will become the primary focus for the iOS team.
As always, both AverageAppleGuy.com and Apple do not recommend installing beta versions of Operating Systems on your primary or daily use devices in case you happen across a crippling bug.