Note: this update is delivered only for iPhone 12 mini, iPhone 12, iPhone 12 Pro and iPhone 12 Pro Max.
With iOS 14.2.1, Apple is aiming to fix some issues for iPhone owners. The primary fix is for the iPhone 12 mini, with the software meant to fix a bug that could cause the Lock Screen to become unresponsive.
With this software update installed, this should no longer be an issue for iPhone 12 mini owners.
In addition, iOS 14.2.1 fixes an issue where some MMS messages may not have been received. Also, the software update addresses an issue where some Made for iPhone hearing devices could have sound quality issues when listening to audio from an iPhone.