iOS 13.5.5 (build 17G5035d) is an official Apple over-the-air update for the iPhone 6s+, released on 2020-06-01T18:09:25Z. The update package is 204.44 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: 392991f861df3a0970d7bb2b70aea851ee693ffc.zip.