FIRMWARE DETAILS

iOS 17.3.1

Build: 21D61Feb 8, 2024Full OTA

Stable

View details

Filename: c9d12324b4edcc4a13364201eefabed76f905449.zip
File size: 6.08 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: 969a283ebe4a03ed3a89ee9d1f162fed63ea2baadfbdce05f96c01f85f5fc131
SHA-1: 032d458ccf7f7f8b2ae263a0f8c5a5019e855e91
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 13 iPhone14,5

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%3B21D61.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: caa4c3b8f1108221a1cf4826799a13ca