This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 07 February 2019 |
| Upload Date | 05 February 2019 |
| File Name | iPhone_5.5_12.1.4_16D57_Restore.ipsw |
| File Size | 3.05 GB |
| SHA256sum | 7535db665d17f40493a7682a8dffd6820c263c82370edd7b01d9437d60e17f3d |
| MD5sum | 90735b9c1a0fbef4f4db86b95ba282aa |
| SHA1sum | b99e152c02ea196930024fcaab4bbdfb832d3e76 |
| Identifier | iPhone8,2 |
cd ~/Downloads.idevicerestore -e iPhone_5.5_12.1.4_16D57_Restore.ipsw and press Enter.