FIRMWARE DETAILS

iOS 17.1 RC 2

Build: 21B77Oct 20, 2023Full OTA

Release Candidate

View details

Filename: dd48181e119fe557dd790956648073f9ebacf4e6.zip
File size: 6.47 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: 45202341bd843d93a65f16e886317af2c4ca8e284e8c8a956da94fdc23181902
SHA-1: 7af7ba56a617fcdefb75653f48f044b0155386bf
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 Pro iPhone16,1

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