iOS 11.3 (build 15E5178f) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2018-02-06T18:21:24Z. The update package is 377.83 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: dab4a86e086aa241d71a40031218d4e80ce533a0.zip.