iOS 11.3 (build 15E5216a) is an official Apple over-the-air update for the iPhone 7 Plus (GSM), released on 2018-03-16T17:05:23Z. The update package is 55.92 MB. This is a delta (partial) update that requires 11.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 31dc7ee440b3ee6e2adcbee1bbd78f1915a0a727.zip.