iOS 9.9.11.3 (build 15E5201e) is an official Apple over-the-air update for the iPhone 6, released on 2018-03-05T18:14:01Z. 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: df403b3430757df8a7a61da6581386dedb676b04.zip.