Downgrade iPhone v2.2 to 2.1 Firmware

/* Posted November 25th, 2008 at 11:27pm */
/* Filed under Apple, How-To, Mods, iPhone */
/* */

iphone 3g stand Downgrade iPhone v2.2 to 2.1 Firmware

If you accidentally upgraded your iPhone to the latest v2.2 firmware and discovered that you lost all your third party jailbroken apps, you have the option to either jailbreak the 2.2 firmware or simply downgrade your iPhone firmware back to v2.1. Should you desire to go down the downgrade route, this guide is for you.

Download the 2.1 restore ipsw firmware for 2G or 3G iPhone.
Connect your iPhone to your computer via the USB cable.
Start iTunes 8.0 (versions up to 8.0.2 will work).
Under the devices tab, select your iPhone in iTunes. If iTunes does not read your iPhone, you will need to put it into DFU (device firmware upgrade) mode. To do so, first power off your iPhone. Then press and hold the Home and Power buttons together for 10 seconds exactly. After ten seconds, release the Power button but continue to hold the Home button until your computer makes the same beeping noise it makes when a USB device is detected. You may see an alert that a DFU device has been detected. When this happens your phone is in DFU mode and you can release the Home button.
On Windows, shift-click the Restore button. On Mac, command-click the Restore button. You will be prompted to select the ipsw firmware file, simply browse to the file you downloaded in step 1 (iPhone1,1_2.1_5F136_Restore.ipsw or iPhone1,2_2.1_5F136_Restore.ipsw).
iTunes will proceed to downgrade your iPhone back down to 2.1 firmware. If you encounter any 10xx series error messages, simply click OK to ignore them. If you get 16xx error messages, your phone is not in DFU mode so go back and try it again following the instructions exactly in step 4.
Follow our guide to jailbreak 2.1 firmware to get your third party apps back.

Note to 3G iPhone users:

If you installed the 2.2 firmware update, your baseband firmware got updated as well. This means if your iPhone is unlocked via a hardware SIM card solution, it may cease to work. This downgrade guide will not help you downgrade the modem firmware, when we have that information we will post it so keep checking back. This downgrade guide is meant for 3G users on the AT&T network who want just to jailbreak their apps again.

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(look4iphone) How To Downgrade Your Iphone 3g 2 30 2 2 1 Baseband For Unlock - http://tinyurl.com/yhdr8e3
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10 Responses to “Downgrade iPhone v2.2 to 2.1 Firmware”

Comment from Igor

/* December 1, 2008 at 10:07 pm */

it doesn’t work. My iPhone 3G came back to v2.2 after complited following these instractions :-(

Reply to this comment
Comment from curt

/* December 8, 2008 at 7:15 am */

igor were did u get instractions my phone is locked too i need help 757-338-1483
help help…

Reply to this comment
Comment from CURT

/* December 8, 2008 at 7:19 am */

IGOR
MY NAME IS CURTIS GIVE ME A CALL ABOUT THE IPHONE DOWNGRADE 757-338-1483

Reply to this comment
Comment from Ella

/* December 15, 2008 at 11:34 am */

Did either of you figur out how to unlock your phone after upgradin to v2.2 and then attemptin to go back to v2.1?

Reply to this comment
Comment from nate

/* January 1, 2009 at 5:09 pm */

i do all these steps and when i am asked to select the file folder, i cannot select anything. i can see the folder and browse the folder, but it will not allow me to ’select’ or ‘choose’ anything.

please advise

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Comment from Omar

/* February 19, 2009 at 8:42 pm */

i tried downgrading the iphone version but then encountered a unknown error please help

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Comment from kings

/* April 10, 2009 at 6:25 am */

i upgrade iphone 3g 2.2 from itunes after all the completetion the iphone doesnot open i tried jail break but….
it always shows pitchure of itunes and a cable in iphone screen …. any soln plz email me….plz..plz

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Comment from mikey j

/* May 8, 2009 at 11:12 pm */

Hey I just downgraded my Iphone from 3.0 to 2.1 and it brings me to the “Restore” Screen!!! It wont let me do anything unless i restore my phone!! Can anyone help!! Email me!

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Comment from Eric

/* June 10, 2009 at 12:47 am */

Please help how to downgrade iphone bootloader 5.09 to 5.08 ?

Thank u very much.

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Comment from Roxy

/* September 20, 2009 at 12:39 pm */

I just did a big mistake of upgrading my iphone to firmware 3.1. Now it is locked. I am unable to downgrade 3.1 to 3.0 or lower. Can someone please help

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