iOS 12.3 (build 16F5139e) is an official Apple over-the-air update for the iPhone XR, released on 2019-04-22T17:08:54Z. The update package is 386.57 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: faf3c82f2e383395749ceb8b72fb6f38fba7fa8a.zip.