I have an iPad 2 gsm on ios 5.1 and have shsh blobs for 4.3.3 . I tried to follow the guides on internet to downgrade it. It says me to enter pawned DFU mode but redsn0w shows an "No operations supported for this device" error. If I try to restore it normally it shows an iTunes error 1 and goes to recovery mode after restoring. Even fixing recovery mode through TinyUmbrella doesn't work. Thanks in Advance.