Many have been complaining from this Error “1611” while downgrading their iPhone 4, 3GS, iPod touch 4G, 3G, iPad firmware from 4.3.5 to 4.3.3. Here is how to Fix this annoying error. Check it after the jump.
There is two method in which you can fix the “Error 1611” Try the first method and if you still have the error go with the second one.
The First method is very simple just Reboot your computer and change the USB port.
Also Here is How to Fix Errors [3194, 1600, 1602, 1013, 1015, 20]