Unkown Error 1：not enter the downgrading mode, change USB faucet (the back one of chassis is better) and restart computer.
Unknown Error 6 ：not enter the downgrading mode, change USB faucet (the back one of chassis is better) and restart computer.
Unknown Error 1013：restart computer; change computer; reinstall system, if iPhone is always in restoring mode: XP users can jump from restoring mode with ibus; MAC users can use iNdependence. (usually on the iPhone with 1.0.2 firmware downgraded from 1.1.1)
Unknown Error 1015 ：restart cmputer；change a computer；reinstall system，if iPhone is always in restoring mode: XP users can jump from restoring mode with ibus; MAC users can use iNdependence. (usually on the iPhone with 1.1.1 firmware downgraded from 1.1.2)
Unknown Error 1417 ：change and use USB faucet behind the chassis.
Unknown Error 1602 ：restart computer；change a computer；reinstall system.
Unknown Error 1603 ：restart computer; change a computer; reinstall system. Please refer to related contents:
Error 1603 When Restoring iPhone in iTunes
Unknown Error 1604 ：restart computer; change a computer; reinstall system.
Unknown Error-35 ：Please refer to related contents：
Errors appear when you download songs from the iTunes Store
Unknown Error–50：Delete Storm Vedio, quicktime，itunes，then reinstall itunes. Please refer to related contents：
iTunes Store: "Error (-50)" when downloading purchased content
Unknown Error-9800, -9815, or -9814：set exact date, restart computer. Please refer to related contents：
iTunes: iTunes Store - Incorrect Date on Mac May Cause -9800, -9815, or -9814 Error
Unknown Error 1413：restart computer; change USB faucet; reinstall system. Please refer to related contents：
Error 1413 when Updating or Restoring an iPod
Unknown Error 1415：restart computer; change USB faucet; reinstall system.
Unknown Error 1417：restart computer; change USB faucet; reinstall system.
Unknown Error 1418：restart computer; change USB faucet; reinstall system.
Unknown Error 1428：restart computer; change USB facucet; reinstall system.
(downgrade from www iphonebus com)
But its still nothing...
Please help me to make a big list error code