I was trying to downgrade from 4.3.5 using 4.3.3 sn0wbreeze. Had 3194 error so turn on TU to fix this. Also had 1604 error which was solved by DFU mode. It is uploading FW almost to end and it stops at the end part. It is now on DFU and can't get out by anything like hard reset or anything. Could anyone help???