iOS 26.3.1 (23D8133) for iPhone Air

✓ 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
FilenameiPhone18,4_26.3.1_23D8133_Restore.ipsw
Filesize10 GiB
SHA256sum0f06f20855a0d2452b5ecb1e0186ad539100b3906827cd2888aaa60942e873a3
MD5sum99e16b47aea60efa90d5e5766621ac87
SHA1sum5d138a0930f9ead4c45f42c851c5ece479e96830
IdentifieriPhone18,4

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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