iOS 10.3.2 (build 14F89) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-05-15T17:02:41Z. The update package is 158.33 MB. This is a delta (partial) update that requires 10.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 51750da4dfc450871bea5c595d9412dc93944bc6.zip.