This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 17 September 2018 |
| Upload Date | 30 August 2018 |
| File Name | iPhone_5.5_P3_12.0_16A366_Restore.ipsw |
| File Size | 3.25 GB |
| SHA256sum | e283654725b6179e9feef9d96f5431225fb32c62eb26d7fe71935c4d2127c682 |
| MD5sum | 5e1b7bd070050bb35fef2e6c09c540dd |
| SHA1sum | e05aa62de26c8005656105f88dd7a12d57e55dfa |
| Identifier | iPhone9,4 |
cd ~/Downloads.idevicerestore -e iPhone_5.5_P3_12.0_16A366_Restore.ipsw and press Enter.