FIRMWARE DETAILS

iOS 17.1

Build: 21B74Oct 25, 2023Full OTA

Release CandidateStable

View details

Filename: e220737ae8036aec4796e614ce475228ab9f3d0e.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: 58ce97c687fef73afc6c3be20d109c59110cdd39a4a9693867f659b6b23acd20
SHA-1: 0575118841131ee5fe0b810c4490c5366dac21a8
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%3B21B74-RC.json ↗

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