This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 12 January 2022 |
| Upload Date | 08 January 2022 |
| File Name | iPhone13,1_15.2.1_19C63_Restore.ipsw |
| File Size | 6.15 GB |
| SHA256sum | 88434d92b125bf81a8e74a6714a175ecf966e1005ea270def0b69c4320f57c37 |
| MD5sum | 1bbb6de9875ffbbae442b2cc606e6feb |
| SHA1sum | c2f75b6305de6303abbb8253753f969611c39183 |
| Identifier | iPhone13,1 |
cd ~/Downloads.idevicerestore -e iPhone13,1_15.2.1_19C63_Restore.ipsw and press Enter.