iOS beta 12.1.3 4 was released for iPhone, iPad and iPod Touch by the Apple company for users who are willing to test the test versions of the operating system. If you are curious about the name iOS 12.1.3 beta 4 that the version has, well there is no logical explanation, Apple only releasing the build for developers and that's it.
iOS beta 12.1.3 4 it can be installed at the moment by any of the users who have installed any beta version of iOS 12 up to now. For now, it is not known what major news iOS 12.1.3 beta 4 will bring, but the short list of changes published by Apple lists the same changes as those offered for beta versions of iOS 12.1.2 released in the past.
iOS beta 12.1.3 4 is released alone tonight, because the first beta versions of watchOS, tvOS, or macOS, with a new callsign, have not yet been released.
