FIRMWARE DETAILS

iOS 17.3.1

Build: 21D61Feb 8, 2024Full OTA

Stable

View details

Filename: e04ee451944c0bcf1ca249d6e65ea8de398d7f2e.zip
File size: 5.81 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: e796c903785777ce883fd4b9d8e49ad2e81f207529ceccd327a861f1f3fc654e
SHA-1: 4b5f4222b75a964b3f9402422366059a6f91e96a
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 XR iPhone11,8

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