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FIRMWARE DETAILS

iOS 17.3.1

Build: 21D61Feb 8, 2024Full OTA
Stable

View details

Filename
e1700e280a5bf99d8c01a19ae1cc5d7c226d09b9.zip
File size
5.85 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
c10a3e38d8cc2665bc31716df9482a98db14cc2ce54386d9bb9103a7ab29c763
SHA-1
72694c9f5308c2ef1db5f941e1c112727a75b787
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 (2)

iPhone 11 Pro iPhone12,3
Unknown
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