Comments on: Jailbreak and unlock iPhone 3GS firmware by downgrading it from 3.1.3 to 3.1.2

By: Iqtedar

Iqtedar — Wed, 15 Sep 2010 05:30:19 +0000

You need to be in recovery mode, then do the iRecovery step and it will run. You can enter recovery mode manually or by using RecBoot for example. However, at step 8, iTunes is not asking anything else but to restore the iPhone again, so it’s this loop that I need to get out of now.

By: Louisejd77

Louisejd77 — Tue, 20 Jul 2010 17:59:45 +0000

PLEASE HELP!!
Tried to break my 3Gs using snOwbreeze and something went wrong, whiped everything! Wont even restore any itunes software ahhhhhh!
PLEASE HELP!!

By: Cecil

Cecil — Mon, 19 Jul 2010 20:30:35 +0000

hi david,

please help, after adding irecovery -s in cmd, it says Got USB No iphone/ipod found, i'm trying to downgrade an iphone 3GS 4.0.1,

Thank you

By: Tarek El-Nemrawy

Tarek El-Nemrawy — Sat, 12 Jun 2010 17:24:18 +0000

1- when i try to give the version 3.1.2 it tells me that its a not compatibe.
2- the iRecovery worked well to recover it basck from safe or DFU mode

By: fadyeldabi

fadyeldabi — Thu, 20 May 2010 00:53:28 +0000

Thank you very very much david. I have spent ages trying to downgrade the firmware to 3.1.2 and your method was the only one that worked

By: Nias

Nias — Sat, 15 May 2010 17:49:02 +0000

device isnt eligible for the requested build!
Wtf is this!

By: Snookie

Snookie — Sat, 15 May 2010 16:45:12 +0000

Hi – Just got a new iphone 3gs version 3.1.3 model mc133b – how can I jailbreak it? )-8

By: David

David — Wed, 05 May 2010 00:56:11 +0000

Hey,
it is really easy to downgrade an iPhone from 3.1.3 to 3.1.2...

There are a few things you have to Download before you start:
-iRecovery
-libusb-win32-filter-bin-0.1.12.1
-iPhone Firmware 3.1.2
-Blackra1n (if you wanna jailbreak your iPhone)

The first thing you have to do is to change a file in windows.
It is the file hosts. You can find that file here:
c:/windows/system32/drivers/etc/
you have to open that file as admin.
In that file you have to go under the last line n add this:
74.208.10.249 gs.apple.com

If you have changed that restart your Computer.

After the restart you can open iTunes n then you put your iPhone into DFU-mode. (hold power+home for 10 seconds n then hold only home for 10 seconds)

Then you have to hold the shift button and press restore in iTunes...the you have to choose your downloaded firmware 3.1.2

iTunes will restore your iPhone then...after you have done that you will get a message that it didn't work. (1015 code)
But this is Normal!

Now you have to install libusb...when it's done open lib usb and then run cmd from windows.

put irecovery on the desktop n then do that:
You will see there c:/Users/yourname>

You have to add this:
cd desktop
irecovery -s
setenv auto-boot true
saveenv
exit
reboot

After that your iPhone will come out of recovery mode n it is done!

You can now (if you iPhone is activated then) jailbreak your iPhone with blackra1n

By: lkey

lkey — Mon, 26 Apr 2010 10:42:27 +0000

same here,i got a 3gs 16 gig with 3.1.3,,it wont let me downgrade,,,how to do it ,any help?

By: fviquez

fviquez — Sun, 25 Apr 2010 03:19:50 +0000

I tried many times and I just get a message that says that my device isn’t compatible with the requested version.

Any idea on how to get error 1015?