Iphone 4 Restore

[darklegacyx3]

Sooo I just got my iphone 4 recently from my uncle and its on 5.1.0 tethered and I heard that 5.1.1 is out and its untethered through RockyRacoon or absine, but the problem is that when I connect my iphone 4 to itunes the restore button is grayed out, does anyone know how to fix it?

I'm not using any sim card atm, I used redsn0w to activate it

[slugrail]

Try getting into DFU mode and test it out, that usually works.

[karmabOy]

try to DFU mode then restOre. . maybe it wOrks. . . .