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 224.33 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: 1f3dc3782638f734a6c92c2bf3d5e6603d6c8ac0.zip.