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 333.67 MB. This is a delta (partial) update that requires 8.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 332d0696010abaab7ed84e6f9311e33741b2ff1a.zip.