iOS 13.3 (build 17C5053a) is an official Apple over-the-air update for the iPhone XS, released on 2019-12-05T21:11:30Z. The update package is 125.18 MB. This is a delta (partial) update that requires 13.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a911ae4f7470d2fd8ec9b600923d028273fba2a3.zip.