FIRMWARE DETAILS

iOS 17.1 RC 2

Build: 21B77Oct 20, 2023Restore IPSW

Release Candidate

View details

Filename: iPhone15,5_17.1_21B77_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: cb9ab2e72bf803a34c4371c4c6d71c140d44965b52f582135f3f128d11e16063
SHA-1: 6347aee3b892e34552437c315d59b0bd7f4945b8
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 15 Plus iPhone15,5

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%3B21B77.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 82d6a11eb2b28ab06384f2fe4e92790b