This firmware is not signed. This means you cannot restore to it in iTunes.
Release Date | 17 November 2021 |
Upload Date | 12 November 2021 |
File Name | iPhone13,1_15.1.1_19B81_Restore.ipsw |
File Size | 6.13 GB |
SHA256sum | b473ba0e2191bdd60224b097fd75ae76462c7e2c9dcc683572b31f8dbeed8548 |
MD5sum | 94934af2baeec80e8ef4ce5ba08a6f48 |
SHA1sum | 0786cbb4ff34c6e36520f65c1f9258b9fe409255 |
Identifier | iPhone13,1 |
cd ~/Downloads
.idevicerestore -e iPhone13,1_15.1.1_19B81_Restore.ipsw
and press Enter.