iOS 8.3 (build 12F5047f) is an official Apple over-the-air update for the iPhone 6+, released on 2015-03-12T16:56:10Z. The update package is 149.94 MB. This is a delta (partial) update that requires 8.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d0ad4a331514a55feeba62321837df07659a75df.zip.