FIRMWARE DETAILS

iOS 15.1.1

Build: 19B81Nov 17, 2021Restore IPSW

Stable

View details

Filename: iPhone13,4_15.1.1_19B81_Restore.ipsw
File size: 6.62 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: 8681413bc9c89a96c2c18c3f722425969f9320d404168c7e06b5cece41fe3c15
SHA-1: c2cb8f4c988a0525655b614681b284beb948d1c5
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 12 Pro Max iPhone13,4IPSW.me public API retrieval · Oct 22, 2026, 3:17 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: 3028dcc1592a248188a773603d22eb0e