iOS 12.1.3 (build 16D5032a) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-12-19T18:07:10Z. The update package is 275.54 MB. This is a delta (partial) update that requires 12.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7f5f04a656a97858d9d946a56bf9c72178e93eda.zip.