iOS 9.9.10.3.4 (build 14G61) is an official Apple over-the-air update for the iPhone 5 (GSM), released on 2019-07-22T17:07:49Z. The update package is 1.19 GB. This is a delta (partial) update that requires 8.4 already installed. This update is currently signed by Apple, so it can be applied from Settings › General › Software Update.

Payload file: 20549f4eb66bffd2b0ca983af7565def903414cb.zip.