iOS 12.4 (build 16G5046d) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-06-11T17:07:45Z. The update package is 289.45 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: bf727c74105cf608101951b0bfcf7ae4198a5cc6.zip.