Yesterday, Apple released iOS 14.2.1 to fix bugs users have encountered on new iPhones since iOS 14.2 launched on November 5. Unlike many other iOS releases, this release was not accompanied by updates to all of the company’s other operating systems.

The update fixes a bug that caused an unresponsive lock screen specifically on the iPhone 12 mini, and it addressed an issue that prevented MMS messages from coming in. Further, 14.2.1 fixes a problem with sound quality on connected hearing devices.

Here are Apple’s release notes for iOS 14.2.1: