iOS 11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-02-19T21:13:46Z. The update package is 27.85 MB. This is a delta (partial) update that requires 11.2.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 21f56c11b278f01180e0abd9cd3713ca08f17b20.zip.