Apple released the fourth beta version of iOS 12.1, watchOS tvOS 5.1 and 12.1. Currently a new test build available only to authorized developers. The final release of the new Apple operating system can take place in a few weeks. It gradually diminishing the release dates of test assemblies.
As for the fourth beta versions of iOS 12.1, watchOS tvOS 5.1 and 12.1, there are no major changes and new features in them was observed. This is reported by users, who got acquainted with the test assemblies closer. Most likely in the fourth beta versions of iOS 12.1, watchOS 5.1 and 12.1 tvOS cupertinos continued to fix some bugs found in previous releases.
Today, many users waiting for the release of the final versions of iOS 12.1, watchOS tvOS 5.1 and 12.1, as in these updates, Apple needs to correct unpleasant defects. For example, users hope that with the release of iOS 12.1, finally, will disappear problems with LTE and Bluetooth on the iPhone and iPad.