iOS 9.3.5 (build 13G36) is an official Apple over-the-air update for the iPhone 6s+, released on 2016-08-25T16:53:36Z. The update package is 314.5 MB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6bd5a8223e99d6decd3483f1866704199833688b.zip.