iOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2019-05-10T17:09:26Z. The update package is 486.2 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 682e5074010dca535504cd80b3253f36c2a420b5.zip.