iOS 9.3.5 (build 13G36) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2016-08-25T16:53:32Z. The update package is 90.18 MB. This is a delta (partial) update that requires 9.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 44bd3779edfd5ff9d2e798a3416c7a36f965a9eb.zip.