Software Update 142 Issues. To access the new software go to Settings General Software Update. Once the iPhone is fully charged attempt the iOS update again.
While we dont know how it affects battery life just yet we know its chock-full of features. Update to iOS 144 with iTunes. If iPhone download and install does nothing on your iPhone then there is a possibility that your device has insufficient storage to update to iOS 142.
Moreover the latest iOS 1421 update claimed to have fixed the problem however that does not seem to be the case.
If you found your iPhone in this list this means that your iPhone is compatible but cant update to iOS 142 due to a different reason. The iOS 142 problems had first come light when it was initially released on October 20 2020. If there is a software update available for iOS or iPadOS install that as well. Go to General Select Software Update.