iOS 8.4 (build 12H143) is an official Apple over-the-air update for the iPhone 5c (GSM), released on 2015-06-30T15:51:20Z. The update package is 412.6 MB. This is a delta (partial) update that requires 8.1.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: a512175eac2a5d463003eb91c605ff2ceb0fd8b8.zip.