iOS 9.3 (build 13E5225a) is an official Apple over-the-air update for the iPhone 6+, released on 2016-03-01T18:13:48Z. The update package is 1.58 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: 56fe83100fda3d5164b139734a6b5f8bafe1092c.zip.