iOS 8.4 (build 12H4086d) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2015-04-27T17:47:06Z. The update package is 122.7 MB. This is a delta (partial) update that requires 8.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 79cea7e47e90720ffece5f9354dd77584042f988.zip.