FIRMWARE DETAILS

iOS 17.5.1

Build: 21F90May 20, 2024Restore IPSW

Stable

View details

Filename: iPhone15,5_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: 7ae65fa01f0e5c8b9681d50a78f6859300299714664cd8037c1293cd4441e408
SHA-1: 755ca7e6a7571460365fe4740e518288f27fab16
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 15 Plus iPhone15,5IPSW.me public API retrieval · Oct 23, 2026, 6:54 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%2C5?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: 6b00603d516c27c759e95c79f97c0a5b