FIRMWARE DETAILS

iOS 17.7.1

Build: 21H216Oct 28, 2024Delta OTA

Release CandidateStable

View details

Filename: 62442fbd66e4432ee4bcdfeb77b9ec2aa597f576.zip
File size: 4.93 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: 1a7c91d2dfd103f724e3e9c2c661ffe2c2af48c2f8e146d7b521e9c3bde0f85c
SHA-1: 9a1fcf7d71cd66a68f0ee2becb310108fc0e04bb
Required starting builds: 18G69, 18G82, 18H107, 18H17
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 XR iPhone11,8

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%3B21H216-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:27 PM UTC
Record fingerprint: e81d7c9fd3ed4ef3917cac95ad2b8b45

AppleDBhttps://api.appledb.dev/ios/iOS%3B21H216.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:27 PM UTC
Record fingerprint: 8bcbb794adc258f42e682d442c6740ea