iOS 11.2.1

iOS

Version

11.2.1

Build ID

15C153

File Size

1.13 GB

Release Date

2017-12-13T18:13:29Z

Update Type

Normal release

Delta update - requires 10.1.1 installed first.

Download OTA

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About This Update

iOS 11.2.1 (build 15C153) is an official Apple over-the-air update for the iPhone 6s, released on 2017-12-13T18:13:29Z. The update package is 1.13 GB. This is a delta (partial) update that requires 10.1.1 to already be installed on the device - it cannot be applied from scratch. This update is no longer signed by Apple, meaning it can no longer be downloaded and applied on-device through Settings.

The OTA payload file is 90e59a7ae92b121c67e245dd012d32c3c9435faa.zip.

Direct URL

http://appldnld.apple.com/ios11.2.1/091-54967-20171213-E17AA0DC-DE18-11E7-92D0-101DF6A180E7/com_apple_MobileAsset_SoftwareUpdate/90e59a7ae92b121c67e245dd012d32c3c9435faa.zip