You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.
❌ This IPSW firmware is not being Signed by Apple
| Firmware Identifier | iPhone14,4 |
|---|---|
| iOS Version | 15.1.1 |
| Release Date | 2021-11-17 |
| Update Date | 2021-11-12 |
| Sha1sum |
265a2dc8ebc4cb74266452042df7ff037bbdbb41
|
| Sha256sum |
3c182424180806348c2d263b8e8e33437f4d2314778c06aee95544e4484e7495
|
| md5sum |
8c0a9d93b94d83547f2adf5fe831d249
|
| Size | 6.16 GB |
| FileName |
iPhone14,4_15.1.1_19B81_Restore.ipsw
|
| Status |
|
It should be noted that these are the official release notes for the = $os ?> = $version ?> from Apple
iOS 15.1.1 improves call drop performance on iPhone 12 and iPhone 13 models.