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Downgrade iOS 4 iPhone 3GS, 3G and iPod touch to iPhone 3.1.3 / 3.1.2[Steps]

Reporter: Under: iPhone On June 26, 2010 58 Comments
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If you are one of those iPhone 3GS (new bootrom) or iPod touch 3G / 2G (MC model) user who has upgraded to iOS 4 only to find out that you cant jailbreak it can follow the instructions posted below to downgrade iOS 4.0 to iOS (formerly iPhone 3.1.3 or 3.1.2).

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Step 1: Download the old iPhone OS 3.1.3, iPhone OS 3.1.2 ipsw firmware files. (Download links: iPhone 3.1.3 firmware for iPhone 2G,iPhone 3.1.3 firmware for iPhone 3G ,iPhone 3.1.3 firmware for iPhone 3GS / iPhone OS 3.1.2 for iPhone 2G,iPhone OS 3.1.2 for iPhone 3G ,iPhone OS 3.1.2 for iPhone 3GS)

Step 2: Put your device into DFU mode (not recovery mode).

* Connect your iPhone to your computer.
* Turn iPhone off.
* Start iTunes.
* Hold Power and Home buttons together for 10 seconds or so.
* Release Power button but keep holding the Home button until your computer recognizes a new USB device.
* iTunes will now recognize your iPhone.

(Step 3 is for iPhone 3GS users only. If you are on iPhone 3G or iPod touch 2G (non-MC model), skip Step 3 and continue from Step 4)

Step 3: This step is applicable to iPhone 3GS, iPod touch 3G and iPod touch 2G (MC model) which have their SHSH blobs (ECID SHSH) saved on Cydia for the firmware you downgrading on. If you don’t have your SHSH files saved, you cannot downgrade the mentioned devices.

So what we will do is to trick iTunes into thinking that it is watching Apple servers, while in real, we are going to change the address to Saurik’s server.

* Navigate to C:\Windows\System32\drivers\etc\ and locate “hosts” file.

Mac users can get to “/etc/” directory by going through “Go –> Go to Folder” from Finder.

* Open this “hosts” file in Notepad (for Windows) or TextEdit (for Mac OS X) and add this

74.208.105.171 gs.apple.com

line as shown in the screenshot below:

Now simply save this file and you are good to go!

NOTE for Windows 7 and Vista: Start “Notepad” with Administrator privileges by right clicking on “Notepad” app, and click on “Run as Administrator“ option.

Step 4: You will now have to restore your iPhone or iPod touch to the firmware you downloaded in Step 1. Click on your phone icon from the sidebar in iTunes. Now press and hold left “alt” (option) button on Mac (Left “Shift” button on Windows) on the keyboard and then click on “Restore” (Not “Update” or “Check for Update”) button in the iTunes and then release this button.

This will make iTunes prompt you to select the location for your downloaded firmware file. Select that ipsw file and click on “Open”.

Step 5: Now sit back and enjoy as iTunes does the rest for you. This will involve a series of automated steps. Be patient at this stage and don’t do anything silly. Just wait while iTunes installs firmware on your iPhone or iPod touch. Your iPhone screen at this point will be showing a progress bar indicating installation progress. Now at some point, iTunes will throw 1011, 1013 or 1015 error at you. This is normal, just ignore this error as the firmware has already been successfully installed on the device.

Step 6: Now you will need to exit your device from Recovery Mode. To do this, download a program called RecBoot (Windows / Mac). Run it and the click on “Exit Recovery Mode” button. Your device will now restart normally.

This is it, you should now be able to jailbreak your device on this older OS. For iPhone 3.1.2 firmware, you can use blackra1n, PwnageTool, redsn0w, sn0wbreeze, ultrasn0w and blacksn0w to jailbreak and unlock your iPhone and iPod touch. For iPhone 3.1.3 firmware for iPhone 2G, 3G, 3GS and iPod touch 1G/2G, you can use redsn0w 0.9.3, redsn0w 0.9.4, sn0wbreeze, PwnageTool 3.1.5. Unlocking can be done using ultrasn0w or blacksn0w. iPhone 3.1.3 (on devices with new bootrom and baseband) can use Spirit to jailbreak iPhone 3GS/3G and iPod touch 3G/2G.

Thanks: RedMond Pie
You could always get support from UnlockAlliPhone.com about any Unlock & JailBreak issue of any model of iPhone including iPhone 2G,3G & 3GS and also upcoming iPhone 4. They provide Premium Members Support for life time. Means just pay one time a small fee and you will receive support(real human support – avg response time 2 hour) for all present & future version of iPhone.

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  On June 26, 2010(1 year, 11 months ago.)
Newer Comments →
  • Japaleja

    cannot save changes to “host” files on mac, suggestions

  • http://asif2bd.info Asif2BD

    Are you admin mode? In TextEdit save it clicking menu after you are done.

  • Ralvarez002

    i dont have ect to get to host file, i have windows vista

  • Glassjash

    it worked but I cannot restore my former backup says the software is too old

  • lui

    You need to change the permission on your mac to read and write. You can do that by >get info>sharing permissions>read and write.

  • playa

    thanks men it worked :)

  • Jimwise68

    Does this work on unlocked iphones? I have had my 3g unlocked so it can be used on any network and i have heard that updating through itunes shuts them down.

  • brahmos

    wt 2 do if i din save my shsh files?

  • Zachary

    I can't find The actual ipsw file, i download the thing but its just in pieces, no actual .ipsw… suggestions?

  • Brayden

    I can't get my iPod in to DFU… I do as im supposed to but itunes says its in recovery. I try holding shift and pressing restore anyways, but i get a message like “Firmware Is Incompatible” please help me?

  • Ravneetdhaliwal

    fuck u it didnt work

  • gimmidat

    When I hit the Exit recovery button, it just says exiting… been waiting over 30mins… help

  • http://asif2bd.info Asif2BD

    Wait while for new tool. Or get expart help from link on the post.

  • http://asif2bd.info Asif2BD

    You probably dotn have SHSH saved.

  • http://asif2bd.info Asif2BD

    Downloaded wrong firmware.

  • http://asif2bd.info Asif2BD

    You need to make sure your system did not rename the firmware file as zip file, if that happen just rename it back as .ipsw.

  • http://asif2bd.info Asif2BD

    For 3G you are safe.

  • Guest

    Did a search for RecBoot software (for the reboot mode of the process, as stated in the instructions) and was unable to find it.
    Does anyone have an idea where to find it? Thanks

  • SigarAtshiva_or_durga

    i hav tried all of this but whn final i m using redsnOw for unlock it is only matches wid iOs4 firmware.
    and in ios4 as you know the network not support the sim card

  • Firstquality72

    “Hold the power and home buttons together” —> What power and home? The computer? or the iphone? If the iphone, i know where the power is, but the home button where can i find it in iphone? Please help. This is kind of confusing steps.

  • http://asif2bd.info Asif2BD

    On the iPhone, dude. The lower round middle key. Remember you could always took help from http://UnlockAlliPhone.com

  • http://asif2bd.info Asif2BD

    We have that in this site. Just search a bit.
    Take a look here
    http://thetechjournal.com/electronics/iphone-el…

  • Truthteller86

    I tried this on my 3rd Gen iTouch, as I am trying to uninstall OS 4.0 because it messed up my ipod and restore 3.1.2….I keep getting a 3194 Error code each time. Any advice?

  • reeve

    Hello i have some problem too… what if i do not have cyndia what should i do???
    and also i cant put in apps into my ipod touch 2G MC after i fail to jailbreak… i am now ab ios 4

  • Aron

    What must i download, i have the ipod touch 3G (32GB), just the 'iPhone 3.1.3 firmware for iPhone 3G' ?

  • Claus Frederiksen

    Brilliant!!

    I followed every step, and my 3G now works perfect again. But, its a scandal that Apple just keeps ignoring this obvious problem…

  • Persianhawkes

    I updated iPod 3G to 4.0 but want to go back to 3.1.3 but I didn't save my shsh file on cydia can I downgrade the firmware still on iTunes 9.2

  • J Kid 13

    i followed every step and get error 3194, fine. what i worry about is that my ipod touch 3G doesnt go into recovery mode, as you say its supposed to do. it just stays in the black screen mode.
    by the way my ipod was already jailbroken, but i had to updated to ios4
    HELPPP PLZZZ!

  • JOE

    THANNNNNNNNNNK YOUUUUUU!!!!!!!!

  • Bob

    Worked for me on my 3G, just as described. Thanks very much!

  • Ro

    On itunes ends up saying
    'this device isn't eligible for the requested build.'
    What to do

  • golf

    Thank you, it work perfectly with iphone 3g

  • Patrickpi4

    it won't let me save change to “hosts” files and I've tried with admin option.

  • Spyda21

    when i get to recboot.. and i hit exit recovery mode.. nothing happens.. my iphone 3g shows the itunes + usb.. but nothing happens.. i have lib-usb installed also

  • Majkabozja

    thank you very much!!!!
    worked and work great on iphone 3G!!

  • Highrisk750

    Everything worked fine up to “Restore from backup” – Restore cannot load because software is too old……. what to do next?

  • Highrisk750

    I did not choose – “backup from …” — although I really wanted to….. I choose “set up a new iPhone” , synch and everything, including applications loaded on the computer came over…. I have to 'customize it – set the favorites again – but worth it!! thanks

  • Kylepuntney

    I got the same error. I even tried to take the computer off-line so it could not ping the iTunes servers, and that stopped the entire process.

    I too am at a stopping point and I don't know what to do next. Any suggestions would be helpful!

  • Biscuit

    I have a 3g and have tried to enter dfu mode a ton. I have never had a problem until now. If I hold the power and home down in 3 seconds the apple logo appears and starts up. It has never done that before. Anyone has ideas?

  • John

    Thanks so much, v.4 was screwing my 3G! This worked a treat – you rock!!

  • ggibby

    I followed every step and the 'Verify with Apple' fails, leaving me with a black iPhone.
    Please clarify “SHSH blobs (ECID SHSH) saved on Cydia for the firmware you downgrading on”
    Does this mean the firmware you started with, or are moving to?

    I currently have a 3GS with OS 4.0. I saved that SHSH to Cydia.
    If I am downgrading to 3.1.2, will that SHSH work?

  • Nathan

    I edited the hosts file as specified above. However I keep getting told that the “device isn't eligible for the requested build.”

  • BTM

    Same here. Click “exit recovery mode” and the window blinks and nothing happens. Used to say libusb0.dll was not found, so I put the dll in the recboot folder, and now that error doesn't occur but nothing happens at all, just the window blinks

  • The Elz

    works (remember to download LibUSB before running bootrec if you have vista. also I lost all my info (so like having a new phone) be prepared for that. thanks for the help though. iOS4 was auful & 4.0.1 was even slower

  • Nathan

    Mine is like a new iPhone 3gs (but not built after the 40th week) – is there someway to get those SHSH files? Nothing works for jailbreaking this phone and I've now put about 12 hours of research and trying stuff into this!

    I hope that a jailbreak comes out for ios 4.0 which doesn't require a previously jailbroken phone (old bootroms) – cause right now it's like I bought a brick for $250….

  • Mayis

    How do people on Ebay have brand new iphone 3gs with iOS4.0 unlocked??

  • another IOS4 victim…

    Hi, how to tell if the SHSH blob file has been saved in Cydia server? Why is it necessary for 3GS to save this file in Cydia server in order to downgrade? Your explanation is very much appreciated…TQVM

  • ellemkay

    I tried this with my iPod 2G and got an error that the file was not compatible… which file should I be downloading?

  • Imapornstar69

    Worked for me but now how do I reinstall my contacts etc?

  • powder

    I cannot get recboot to work. I downloaded and installed the .dll and sav d it in the recboot folder along with the LibUSB but I keep getting an error and it won't exit recovery mde. Windows 7 please help!

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