This firmware is not signed. This means you cannot restore to it in iTunes.
Release Date | 08 April 2015 |
Upload Date | 04 April 2015 |
File Name | iPhone5,3_8.3_12F70_Restore.ipsw |
File Size | 1.54 GB |
SHA256sum | a12b66d10594b54206f3a7cf908c6c6a80e34c3306b1c9f7ec0bf6278bd5b73d |
MD5sum | c07fc0cacc77e08424d1a2d2a50578dd |
SHA1sum | 5bfd47eda92371d0459b7a7c955a547968e43edd |
Identifier | iPhone5,3 |
cd ~/Downloads
.idevicerestore -e iPhone5,3_8.3_12F70_Restore.ipsw
and press Enter.