FIRMWARE DETAILS

iOS 15.3.1

Build: 19D52Feb 10, 2022Restore IPSW

Stable

View details

Filename: iPhone13,4_15.3.1_19D52_Restore.ipsw
File size: 6.64 GB
File type: Restore IPSW
Download host: updates.cdn-apple.com
Link availability: Not verified
Source did not report availability
Last link check: Not checked
SHA-256: 0854c7e389f58a14232cabdae01a2229c35ee1d80337b0f3ddabda3f5bd8f922
SHA-1: 7247fdfbf5a1f45c70396abc0403834585ec4268
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 12 Pro Max iPhone13,4IPSW.me public API retrieval · Oct 23, 2026, 2:35 AM UTC

Unsigned

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

Source provenance

IPSW.mehttps://api.ipsw.me/v4/device/iPhone13%2C4?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: ba39f02d679788f01106f0d68aa2b713