iOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPhone 7 Plus (Global), released on 2017-12-13T18:14:45Z. The update package is 1.31 GB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7ce93f24877da5d83932d6e4a16e6da28e86b05a.zip.