iOS 11.2 (build 15C5111a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-11-28T18:00:54Z. The update package is 33.1 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f4cd018a3ed06cd5475decfe3374379bb9c66ef9.zip.