iOS 12.1 (build 16B5059d) is an official Apple over-the-air update for the iPhone SE, released on 2018-09-18T17:20:24Z. The update package is 403.69 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 447ec7196a816c5672408c51d744b40c688277a8.zip.