iOS 12.0 (build 16A5288q) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-06-05T09:52:39Z. The update package is 1.19 GB. This is a delta (partial) update that requires 11.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 327b573a73c337f0ac0485a383e25642ba9736e4.zip.