iOS 13.5.5 (build 17G5035d) is an official Apple over-the-air update for the iPhone 6s, released on 2020-06-01T18:09:23Z. The update package is 223.34 MB. This is a delta (partial) update that requires 13.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e438dd87cf63db8737d211cdbbee213e8229a4a8.zip.