FIRMWARE DETAILS

iOS 17.1

Build: 21B74Oct 25, 2023Restore IPSW

Release CandidateStable

View details

Filename: iPhone15,4_17.1_21B74_Restore.ipsw
File size: 8.02 GB
File type: Restore IPSW
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: 7b05a5393dfa738fbd9fba2c0782714163789f9ee63aaca70a905599c1b629d4
SHA-1: 9a97267b3234731a4a5988a9d67b59cf20ff2c23
Required starting builds: Not reported
Board restrictions: Not reported

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%3B21B74-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 596792c64544009bb3cdf2ce13596537