FIRMWARE DETAILS

iOS 17.1

Build: 21B80Oct 25, 2023Delta OTA

Stable

View details

Filename: 871f33e737c94981d45fb3143fa73ff338f4b17b.zip
File size: 1.46 GB
File type: Delta OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: 5c681d00f41a9b9f09ae69cf17680a7c1b7858c4743b0ec204a3494b4e7ed7b4
SHA-1: ddb68c07b82799853e860b2425a9669f7e5933ee
Required starting builds: 21A326, 21A327, 21A329, 21A360
Board restrictions: Not reported

OTA packages can require an exact starting build and board. A matching hardware identifier alone is not sufficient for installation.

Compatible hardware (1)

iPhone 15 iPhone15,4

Unknown

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

Source provenance

AppleDBhttps://api.appledb.dev/ios/iOS%3B21B80.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 0c4ce2fa2e67994f9d70a827901c0dd4