iOS 12.1 (build 16B5068i) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-10-02T17:12:05Z. The update package is 294.47 MB. This is a delta (partial) update that requires 12.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: f10a5557f0c8d154fd0b9ac51048c03766bcb493.zip.