iOS 9.9.10.2.1 (build 14D5027) is an official Apple over-the-air update for the iPhone 6, released on 2017-01-12T21:11:45Z. The update package is 1.69 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: d39809b59537d425b376c3e2c59f68426d82dfc3.zip.