Download iOS 17.3.1 for iPhone 15 (iPhone15,4)
Signed IPSW files can be restored via iTunes, 3uTools. Unsigned IPSWs cannot currently be restored via iTunes, 3uTools.
Signed status can change daily, you should check signed status before restored
Firmware information
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File name
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VersioniOS 17.3.1 This firmware is unsigned. You can not restore to it
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Build ID21D61
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Size7.40GB
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Release date2024-02-08 19:54:13
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Upload date2024-02-05 17:35:14
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MD5
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SHA1
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SHA256
iPhone 15
iPhone15,4
* Apple server is official from Apple. Other links are re-upload to other hosts.