iOS 9.1 (build 13B5143) is an official Apple over-the-air update for the iPhone 6, released on 2015-10-21T17:15:46Z. The update package is 1.35 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: 9e39d9c77d2983147482591e588045071e083786.zip.