iOS 10.3.2 (build 14F5080a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-04-17T17:11:08Z. The update package is 526.92 MB. This is a delta (partial) update that requires 10.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 208891251518d5a99e067aefbdb761014bbc42a4.zip.