iOS 12.3 (build 16F5148a) is an official Apple over-the-air update for the iPhone 6+, released on 2019-04-29T17:36:10Z. The update package is 90.99 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: a9207a87d155c0a5623462478b4bd98f1dab5b66.zip.