✗ This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 10th February 2022 |
|---|---|
| Upload Date | 7th February 2022 |
| Filename | iPhone_4.7_P3_15.3.1_19D52_Restore.ipsw |
| Filesize | 5.77 GB |
| SHA256sum | e61fbceef506092cdcea2d1937b4c5842b636bf98426ca46a9127bbf9dbabe88 |
| MD5sum | cfa34e4b9a5b19333bf82603af629d80 |
| SHA1sum | 31c8da384b3e5bc07546c512d670c0452d36c8f1 |
| Identifier | iPhone9,1 |
iOS 15.3.1 provides important security updates for your iPhone and fixes an issue that may cause Braille displays to stop responding.
For information on the security content of Apple software updates, please visit this website: