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FIRMWARE DETAILS

iOS 17.1 RC 2

Build: 21B77Oct 20, 2023Full OTA
Release Candidate

View details

Filename
d9b3403b7f832b9bd3fc282c165b00e0387601c0.zip
File size
6.48 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
9cdc7af6800c294331022a292b3fcdd0e52d894955fa7b8bbbd2f04e6f8fcd15
SHA-1
7eac965f4817af651009b08bad26ac122a902eb9
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)

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