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 315.88 MB. This is a delta (partial) update that requires 12.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c5146cae724464c14e98ed635bae1274d718537e.zip.