iOS 14.8.1 (build 18H107) is an official Apple over-the-air update for the iPhone 12, released on 2021-10-26T17:00:00Z. The update package is 172.46 MB. This is a delta (partial) update that requires 14.8 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 390ffe60f20512848ed559e4b1d4258ab007b3e1.zip.