This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 19 January 2016 |
| Upload Date | 12 January 2016 |
| File Name | iPhone5,3_9.2.1_13D15_Restore.ipsw |
| File Size | 1.56 GB |
| SHA256sum | a39d18e6aea0417e650c67fce09afa535bb02feec7a045e2ed176f2dd129186d |
| MD5sum | 5e1ac67016b8476b2d0547e30a5fb7bb |
| SHA1sum | d4a63a7e126e6221d97a755cd17fc9b5cf5df424 |
| Identifier | iPhone5,3 |
cd ~/Downloads.idevicerestore -e iPhone5,3_9.2.1_13D15_Restore.ipsw and press Enter.