FIRMWARE DETAILS

iOS 17.1 RC 2

Build: 21B77Oct 20, 2023Full OTA

Release Candidate

View details

Filename: 4809cc14ba737ddcbc5ae0e6fc1d4e0ffa7c11be.zip
File size: 6.33 GB
File type: Full OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: fb8da2d0592a3ddb2dabf89fcf55be714476e67896e2d91c2011ae93b110dd99
SHA-1: 1042b7c837ab2dd19622fb7a4e500f1d9bc95973
Required starting builds: Not reported
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%3B21B77.json ↗

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