07-13-2008, 07:44 PM
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Moderator
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Join Date: Jan 2008
Device + Firmware: AT&T 2G 2.2.1 & 3GS
Operating System: Leopard / XP/Windows 7
Location: Austin, TX
Posts: 4,030
Thanks: 154
Thanked 708 Times in 501 Posts
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I have personally gotten bigboss' instruction to work. The KEY I will say again is DFU mode. If your screen has anything on it at all (like the iTunes logo) you are not in DFU mode. Your screen will be completely BLACK when iTunes says "iPhone detected in recovery mode, please restore." This will avoid error 20 and should give you error 1015 instead.
DFU steps for phone on 2.0:
* Attach the phone to the pc
* Turn the phone off
* Hold power and home together for *exactly* 10 seconds
* Release power but keep holding home until the pc beeps as a USB device is recognized.
* At no point will the display come on. Now your restore should work.
Now... after you get error 1015, boot your phone into normal mode with ibrickr or iLiberty. Then use KiPhone to iErase your 4.05.04 base band. Finally restore to 1.1.4 AGAIN to write the 4.04 base band. Download Kiphone here: KiPhone
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