iOS 9.9.10.3.4 (build 14G61) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2019-07-22T17:07:52Z. The update package is 914.17 MB. This is a delta (partial) update that requires 9.3.4 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: cb1442dfdcce0d2b8a06fab4efea0365c71a5c71.zip.