iOS 9.9.13.4 (build 17E5255a) is an official Apple over-the-air update for the iPhone XS, released on 2020-03-10T17:21:26Z. The update package is 3.77 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5dca8a8acaa3c8f650144cc3dee31f1ad01b7870.zip.