UPDATE #1: Some reported that they were able to restore after several attempts. It’s wise to be patient and wait. This is probably Apple’s server is extremely busy to verify your device. It’s still wise to check the steps below.
UPDATE #2: If you have already backed up your device, instead of clicking ‘Update’ on iTunes, download the firmware for your device here first and do ‘Shift+Restore’ on Windows or ‘Option+Restore on Mac. Then select the firmware file you just downloaded.
Trying to update to iOS 5 and getting an iTunes error 3200, 3014, 3004 or 3002? This usually means that iTunes is unable to connect to Apple firmware verification server to get the SHSH Blobs because of your hosts file. Thankfully, there’s an easy fix.
4. Try restoring to iOS 5 again.
Any issues? Leave your questions below.