iOS 13.0 (build 17A5556d) is an official Apple over-the-air update for the iPhone XS Max, released on 2019-08-07T17:04:51Z. The update package is 810.64 MB. This is a delta (partial) update that requires 13.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bbb68778f957d55f6b877b80fc3ad84b3dd50a17.zip.