iOS 26.3.1 (23D8133) for iPhone 17

✓ 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
FilenameiPhone18,3_26.3.1_23D8133_Restore.ipsw
Filesize10 GiB
SHA256sume395f64fa5f6f443097944a4905546c2c8610dae570ce04c707bc26c5efdfdb9
MD5sumecd7b9eeaed22b9b04affcb18c07919c
SHA1sumd5cdb6f44819fd1dd51d323d730cffcb4cc245d2
IdentifieriPhone18,3

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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