iOS 15.7.1 (build 19H117) is an official Apple over-the-air update for the iPhone 11, released on 2022-10-27T17:34:31Z. The update package is 3.03 GB. This is a delta (partial) update that requires 14.8 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8c8c5b721224551221150685ce2d02843ad12863.zip.