This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 31 March 2022 |
| Upload Date | 28 March 2022 |
| File Name | iPhone13,4_15.4.1_19E258_Restore.ipsw |
| File Size | 6.07 GB |
| SHA256sum | a339d9f07f385580280bf21da80606909c48eb8528b1ee2721bc30c35467938d |
| MD5sum | ccf16e082b674b858c697b6b7e05b68a |
| SHA1sum | dfff2263cfca77a7ae5c8185ca9d3f430bc2f97c |
| Identifier | iPhone13,4 |
cd ~/Downloads.idevicerestore -e iPhone13,4_15.4.1_19E258_Restore.ipsw and press Enter.