iOS 9.9.11.4.1 (build 15G5072a) is an official Apple over-the-air update for the iPhone 6, released on 2018-06-18T17:05:39Z. The update package is 1.84 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c89d58342b5b44522c1a83e4048940ff16ba2bdf.zip.