It has to do with the Court battle between Qualcomm and Apple in the Chinese courts. The update disabled certain functionality for iPhones in China.Two versions of the release of 12.1.2? That sounds like surprisingly poor software control or have I missed something?
Probably not as iOS 12.1.2 only had various bug fixes for the iPhone.I wonder if there will be a iPad 12.1.2 at some point.?
Further updates:
macOS, tvOS, Safari, iCloud, iTunes.