How to Downgrade iPhone 3.1.3 to 3.1.2

By , Feb 7, 2010

downgrade iphone 3.1.3 to 3.1.2

As always when a new firmware is being realeased, there is always a few unlucky people who “accidentally” update or restore to the latest firmware, thus losing their jailbreak and unlock.

In this case, you’d usually want to downgrade your iPhone from 3.1.3 to 3.1.2 simply by downloading 3.1.2 and SHIFT + Restore in iTunes so that you can choose your own firmware to restore to.

The problem is that Apple recently stopped signing all previous firmware versions making it impossible for you to downgrade.

Fortunately, Saurik has been smart enough to create a system to bypass Apple’s signature and making it possible for you to downgrade from 3.1.3 to 3.1.2. To do so, you will need to have your SHSH on file. To see if it’s on file, launch Cydia and look at the top. Mine says “This device has SHSHs on file for iPhone OS: 3.0, 3.1, 3.1.2″.

If you don’t have this, make sure you look for a link that says “Make my life easier” on Cydia. This will allow you to save your SHSHs.

This being said, downgrading an iPhone 3GS from 3.1.3 to 3.1.2 is easier said than done. It’s actually a pretty painful process that I detailed in a tutorial a few month ago. I originally wrote this tutorial to downgrade from iPhone 3.1 to 3.0 but the steps are exactly identical (MuscleNerd confirmed this).

If you’re one of those who need to downgrade your iPhone firmware, then check out my tutorial, or simply wait for the Dev Team to come up with a reliable jailbreak for 3.1.3. Something tells me PwnageTool is not too far ahead of us ;)

UPDATE: If you have an iPhone 3G, you can now downgrade from baseband 05.12.01 to o4.26.08.

UPDATE 2: This post is slightly outdated. Check out this page for the latest information about downgrading your iPhone.

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  • DARSHIT SHAH

    JUST GO TO HEERA PANNA SHOPPING CENTER (MUMBAI)

    SHOP NO 100

    MEET BABU BHAI (MOBILE REPAIRER)

    HE WILL DOWNGRADE / UPGRADE / JAILBRAKE & UNLOCK ANY IPHONE 2G / 3G / 3GS

  • sc0pie

    hi my iphone 3GS firmware 3.1.2 is already jailbroken i payed $10 to jailbreak it, then when i know how to jailbroke my ipod touch then the thing is..

    my iphone is jailbroken already, then i used a spirit to jailbreak my iphone 3gs 3.1.2 again then after jailbreaking it it stuck in the apple icon just restarting to apple icon i wait for 10mins for taht and its still the same then i unplug it on the computer and tried the hard reboot hold the power and the home after 10 sec unhold the power while holding the home and waited for 25 secs and tried also the hold both power and home button for 30 secs and guess what itwetnt o the apple with the cord on it but it goes back to the stuck apple icon again and i cant even restore my iphone

    if im gona restore it this error come out The iPhone “iPhone” could not be restored. This device isn’t eligible for the requested build.

    that is the error so if anyone can help me with this one.. please i need a solution

  • sc0pie

    @danny thats not a dollar its a peso (philippine money) and it cost what 8-9 bucks???

  • S1mon

    Hi i’m looking for a way to upgrade my old firmware to 3.1.2 and skip iOS4.

    Is there a way to do this?

    I have official unlock 3g phone.

  • alabaster

    Okay, I have followed the downgrade guide. 3.1.2 firmware. Installed twice. got error message. launched redsn0w 9.3. pointed to 3.1.2 firmware. ran, installed and then boot image only. I have since done this a few times and now I have it running with Cydia installed but NO AT&T service. What the hell happened!!!!

  • aurelio

    hi guys,,, hey I have a question….

    I bought a iphone 3gs in ingland, and unlocked it.. .now I´m living in Italy, and I wanto to the latest update by apple……. now i heard that if I update it, it will block and I´ll lose de phone!!!

    can anyone tell me how i can update it without losing the phone?
    thank´s

  • Stinky

    you can use the regular software 3.1.2 in itunes and then it gives you an error then run blackrain to fix it . fastest downgrade ever

  • lisa

    I have a 2g iphone. It was unlocked and jailbroke for tmobile. I got on itunes and upgraded to 3,1,3 firmware. I followed steps to the t. But now my phone is stuck. The screen says emergency calls. I restored back to factory settings on itunes. What do I need to do? Please help. I love my iphone and miss it. I tried to download firmware and redsnow to my laptop but it won’t open so I can try to redownload again. When I get on itunes and plug in phone it says put correct sim card in. I don’t have att sim card.

    • littledaemon

      2g is pretty old phone. A lot of the new hacks are not supported on 2g. did you manage to get it working? if you could borrow an att sim card from a friend who uses ATT, then get the phone working first. Once working, jailbreak it and then pop your sim card back in

  • BigD

    My iPhone 3GS is totally locked. I can’t even go to home, let alone Cydia. I have a T-mobile SIM card, and cannot get my hands on a AT&T SIM.

    If there is a way, can someone showed me how to Unlock an iPhone 3GS 16GB that is completely locked.

    there are many good guides/tutorials here, but there is in fact TOO much, that I dunno which one is for me. please help.

    • littledaemon

      bigD.. what city are you in?

      • BigD

        Wichita, KS. Why do you ask?

    • littledaemon

      Your name said bigD.. thought you were in Big Dallas.. coz I am and if you were you could bring your phone to me and we could try work on it.

  • ste

    lol @ lisa same bout

  • Matt

    PLEASE HELP
    I have done everything until it says to press shift and restore. when the menu comes up i go to the folder that i downloaded os 3.1.2 but itunes says that there is nothing there. What do i do???

    • littledaemon

      Calm down Matt, explain the problem in detail first. What sort of phone is it? 2g/3g/3gs? How would you rate your software troubleshooting skills – novice/intermediate?

  • Matt

    I have an iphone 3gs ios 4.1 new bootrom but the forum says i need to jailbreak os 3.1.2 first,so then i have to downgrade so when i download the link and unzip the restore there is a couple files but when i look for it from itunes there is nothing there?

    PS im a novice forsure i just recently got my iphone and still trying to figure things out

  • Matt

    hey justto let you know it didn’t work again

  • http://youtube.com/SuperBernie3 Bernie

    Im tired its way way way easy

  • Data

    do i miss any data from my iphone when i doungread my iphone?

  • edobor j

    first am was having a problem with my wifi unable to find any network; secondly, i try to default my setting the greatest problem occurred, (1) still butting for 36hrs still now (2) phone displaying apple icon (3) unable to on pls help me

  • Mar

    Does anyone know if I will “confuse” my daughter’s iPhone 3 if I downgrade it on my Mac? She normally runs it on a Windows computer, but that will not be available to me when I do the downgrade.

  • Randi

    Hi I am extremely upset, I recently bought a jailbroke iphone 3g. I know next to nothing about these and was trying to download some apps through itunes and it said I couldn’t without updating the phone, which I did, and I think I made a huge mistake. I got an error message and said I had to restore the phone, which I tried to do but the restore won’t go through. Is there anyway to fix this??

  • zubair

    can any one help me with getting the mms service in iphone 2g with 3.1.3 version.. i have the parameters but i cant get the mms settings in networks – cellular data .. :(