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

Payload file: 1a565f35a29d549bb8a44f881f9fe5ee510f36a6.zip.