FIRMWARE DETAILS

iOS 17.3

Build: 21D50Jan 22, 2024Delta OTA

Release CandidateStable

View details

Filename: c3531ca691a6857046f6a9b27c07e06906df069e.zip
File size: 1.32 GB
File type: Delta OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: f30ef425ce40e529f7f518c2d439f05a49beb77b687dc0c9aeeccc80171fd34d
SHA-1: 88f911c0fad5d6cfb480d671f68f3d59e5225a74
Required starting builds: 21A326, 21A329, 21A360
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 SE (2nd generation) iPhone12,8

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%3B21D50-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 4b3232377333738272b60b561711624e

AppleDBhttps://api.appledb.dev/ios/iOS%3B21D50.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: b760c8e57a8ccf1aa32ec81eaf502938