FIRMWARE DETAILS

iOS 17.5.1

Build: 21F90May 20, 2024Restore IPSW

Stable

View details

Filename: iPhone15,3_17.5.1_21F90_Restore.ipsw
File size: 8.09 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: b7478f37a42f10d34f4a6c8318ec4f182db4dc6406aa4e04121aa7260464eb56
SHA-1: 3dcbd2d000ac9f272634bb0b427e7533eebd4aba
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 14 Pro Max iPhone15,3IPSW.me public API retrieval · Oct 21, 2026, 11:01 AM UTC

Unsigned

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%3B21F90.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 1ae039bd01274135bfccfb7ce06a0234

IPSW.mehttps://api.ipsw.me/v4/device/iPhone15%2C3?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: 21ab1688a3075c47262dfbd28e50108a