iOS 9.3.3 (build 13G34) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2016-07-18T17:55:23Z. The update package is 1.04 GB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: ba8c8ae9b422a2fd9f0227b38343d3f601543ed9.zip.