iPhone 15 Pro Max · iPhone16,2

iPhone 15 Pro Max · iOS 17.3.1

21D61Unsigned

Catalog data · Last updated: Oct 23, 2026, 9:51 AM UTC

Restore IPSW for iPhone 15 Pro Max: iOS 17.3.1, build 21D61.

Firmware information

Version: iOS 17.3.1
Build: 21D61
IPSW: Restore IPSW
Size: 7.58 GB
Release date: Feb 8, 2024, 7:54 PM UTC
File name: iPhone16,2_17.3.1_21D61_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comiPhone16,2_17.3.1_21D61_Restore.ipsw

Back up before you restore. A restore can erase the data on the device. The identifier has to match, and a file you can download may still be rejected for restore.

Checksum

SHA-256696bb586dfe81b91b8690062826c8e8b2626074de1fb182e6e883550a2eb9fea

SHA-15204c6d60e24f97ee4dab9dcbe06a935ac04a294

MD5849f23ae7b63600a2959e1ecd0b15911