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 2

Apple only allows restoring to a signed version.

iOS 6.1.6 10B500 784.85 MB 2014-02-21 Download IPSW
iOS 4.1 8B117 382.02 MB Download IPSW
Archived firmware 24 no longer signed
iOS 6.1.3 10B329 784.87 MB Download
iOS 6.1.2 10B146 784.50 MB Download
iOS 6.1 10B141 784.52 MB Download
iOS 6.0.1 10A523 780.42 MB Download
iOS 6.0 10A403 780.43 MB Download
iOS 5.1.1 9B206 687.02 MB Download
iOS 5.1 9B176 687.03 MB Download
iOS 5.0.1 9A405 684.91 MB Download
iOS 5.0 9A334 668.71 MB Download
iOS 4.3.5 8L1 420.17 MB Download
iOS 4.3.4 8K2 420.15 MB Download
iOS 4.3.3 8J2 420.11 MB Download
iOS 4.3.2 8H7 420.11 MB Download
iOS 4.3.1 8G4 419.88 MB Download
iOS 4.3 8F190 423.20 MB Download
iOS 4.2.1 8C148a 401.32 MB Download
iOS 4.0.2 8A400 377.95 MB Download
iOS 4.0.1 8A306 377.96 MB Download
iOS 4.0 8A293 377.92 MB Download
iOS 3.1.3 7E18 290.99 MB Download
iOS 3.1.2 7D11 306.14 MB Download
iOS 3.1 7C144 306.14 MB Download
iOS 3.0.1 7A400 297.86 MB Download
iOS 3.0 7A341 297.83 MB Download