Comments on: How to Downgrade iPhone OS 3.0 to 2.2.1 | Step-by-Step Guide

By: how do I change from 3.0.1 to 2.2.1? - AVForums.com

how do I change from 3.0.1 to 2.2.1? - AVForums.com — Mon, 01 Feb 2010 14:19:31 +0000

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By: dnns

dnns — Sat, 02 Jan 2010 18:58:43 +0000

Try this. You need to go step by step. I had to downgrade from 3.1.2 to 3.1 first, then down grade to 3.0. I then assume you can do it from 3.0 to 2.2.1

By: BlacKHearT

BlacKHearT — Tue, 11 Aug 2009 07:11:24 +0000

hye there..

i got some trouble from restoring my 2g iphone..
it cant be restore to previous firmware.. i try ur way got same result… help meee…… =((

By: Jfk

Jfk — Fri, 19 Jun 2009 12:55:20 +0000

Yeah I’m getting 1601 when downgrading to 2.2.1. Can anyone here help?

By: Ajit

Ajit — Fri, 12 Jun 2009 16:07:24 +0000

i have error 1604 occurs while downgrade to 2.2.1

By: NLP

NLP — Thu, 11 Jun 2009 07:25:46 +0000

sorry . but i follow your steps but nathing done.. error 13, some time 1604 some times 1603

By: FW 3.0 Get next weeks OS today! + Tethering - Pagina 2 - iPhone Forum - alles over de Apple iPhone en iPhone 3G

Wed, 10 Jun 2009 17:53:42 +0000

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By: fikosss

fikosss — Fri, 29 May 2009 08:53:39 +0000

hey guys,when i am downgrading my 3G 8GB from 3.0 to 2.2.1 an error occur it says :
the iphone could not be restored.an unknown error occurred 1604
any help ?