iOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-07-16T17:39:41Z. The update package is 127.19 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 94b193d2cc12d21fbe5eb4666c296a68abbfab7e.zip.