This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 25 March 2019 |
| Upload Date | 18 March 2019 |
| File Name | iPhone_4.0_64bit_12.2_16E227_Restore.ipsw |
| File Size | 2.87 GB |
| SHA256sum | ba327f3dc373630ebc94bd48e01c0a3008b6a957fb6d1d5dab20a0d7b7d55d54 |
| MD5sum | 222dc9761a32e5adf5bf53fb3a5f4d38 |
| SHA1sum | 178602b49d09e613c209c85a20f07faef8981844 |
| Identifier | iPhone6,2 |
cd ~/Downloads.idevicerestore -e iPhone_4.0_64bit_12.2_16E227_Restore.ipsw and press Enter.