iOS 11.4.1 (build 15G77) is an official Apple over-the-air update for the iPhone SE, released on 2018-07-09T17:10:36Z. The update package is 1.27 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 594409ed36910abbddb915d9e63e9168e8d776e3.zip.