iOS 26.3.1 (23D8133) for iPhone 11

✓ This firmware is signed. This means that you can restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

Release DateMarch 4, 2026
Upload DateMarch 1, 2026
FilenameiPhone12,1_26.3.1_23D8133_Restore.ipsw
Filesize8.9 GiB
SHA256sum57905a2176dcccde68f44993cc0132924b7982419824ca788967fa6238587bd9
MD5sumd9b82ca7f698ec36c0b6aa3eebd1845c
SHA1sum67b059db5a597c00574c14b35fb5756066cfe1f1
IdentifieriPhone12,1

iOS 26.3.1 Release Notes

Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

This update provides bug fixes for your iPhone

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/100100

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