Ramdisk not supported

The tool can't boot a ramdisk on this device. Apple's official firmware for it is listed below.

iOS firmware — currently signed 1

Apple only allows restoring to a signed version.

iOS 6.1.6 10B500 847.72 MB 2014-02-21 Download IPSW
Archived firmware 19 no longer signed
iOS 6.1.5 10B400 847.75 MB 2013-11-15 Download
iOS 6.1.3 10B329 847.73 MB Download
iOS 6.1.2 10B146 847.35 MB Download
iOS 6.1 10B144 847.47 MB Download
iOS 6.0.1 10A523 839.91 MB Download
iOS 6.0 10A403 839.97 MB Download
iOS 5.1.1 9B206 750.00 MB Download
iOS 5.1 9B176 750.00 MB Download
iOS 5.0.1 9A405 777.75 MB Download
iOS 5.0 9A334 761.58 MB Download
iOS 4.3.5 8L1 650.47 MB Download
iOS 4.3.4 8K2 650.44 MB Download
iOS 4.3.3 8J2 650.27 MB Download
iOS 4.3.2 8H7 650.26 MB Download
iOS 4.3.1 8G4 650.10 MB Download
iOS 4.3 8F190 652.88 MB Download
iOS 4.2.1 8C148 608.61 MB Download
iOS 4.1 8B118 580.18 MB Download
iOS 4.1 8B117 580.18 MB Download