iOS 9.3.3 (build 13G34) is an official Apple over-the-air update for the iPhone 4s, released on 2016-07-18T17:55:11Z. The update package is 856.17 MB. 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: c608f5561072330b9d256e6b2c2e9195f4da195b.zip.