iOS 8.1.3 (build 12B466) is an official Apple over-the-air update for the iPhone 6+, released on 2015-01-27T17:55:06Z. The update package is 304.12 MB. This is a delta (partial) update that requires 8.0.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e39bd9a6ee2f30e5ba25c674d6e62c2c925165b2.zip.