iOS 8.1.1 (build 12B5435) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2014-11-17T18:06:02Z. The update package is 1.69 GB. This is a delta (partial) update that requires 8.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 39ffaed3fa76e5169c80b49218a4c6c36666436e.zip.