How to Downgrade iOS 4.1 on iPhone 4, iPhone 3GS & iPhone 3G

By Sandip Dedhia on September 8, 2010
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iOS 4.1 has been released today and we have already posted iOS 4.1 direct download links. Also note on status of iOS 4.1 jailbreak & unlocked has been published here. Despite of several warnings no wonder many user still accidentally ends up updating to iOS 4.1 when they see an update message in iTunes and once you have updated to latest iOS firmware you will lose ability to jailbreak & unlock rendering your iPhone virtually dead.

If you don’t rely on unlock & have accidentally updated to iOS 4.1 then below is guide to downgrade to iOS 4.0.2/4.0.1 or 4.0 which can be still jailbreaked using JailbreakMe.com. The below method works on iPhone 4, iPhone 3GS & iPhone 3G only if you have backed up SHSH Blobs.

Downgrade iOS 4.1 on iPhone 4, iPhone 3GS & iPhone 3G

1. Download SHSH Blobs saved on Saurik server, to do so download TinyUmbrella.

2. Now Connect your iPhone and run TinyUmbrella downloaded in step 1. Now check the “Advanced Options” box & under “Device/Version” drop down list select the firmware version to which you wish to downgrade (i.e. iOS 4.0.1).

Finally, select “Cydia” under “Request From”. Then hit “Save My SHSH”. This will grab your SHSH files from Saurik’s servers and save them to your computer.

TinyUmbrella Download SHSH from Cydia

3. Now download iOS 4.0.1 or the firmware version you selected in above step from here.

4. Put your iPhone in DFU Mode. To do so, launch iTunes and plug your iPhone in. Press and hold the Home and Power button together for 10 seconds. After 10 seconds, release the Power button while still holding the Home button until iTunes pops up and says it has found an iPhone in recovery Mode.

5. Run TinyUmbrella and click the “Display SHSHs” button to make sure your SHSH blobs were downloaded to your computer. Once done, click “Start TSS Server”.

Kick out of Recovery

6. Now you need to restore your iPhone for this launch iTunes and plug your iPhone in. Hold the SHIFT key (Windows) or ALT/Option key (Mac) while clicking on Restore. Make sure you hold the key while clicking Restore. A window will open. Simply select the firmware you downloaded in step 3.

Step 7: Your iPhone will be downgraded/restored to the iOS version you chose. iTunes might give you error messages (error 1011, 1013, and 1015). Don’t worry about them.

Step 8: We now need to get your iPhone out of recovery mode. To do so, open TinyUmbrella and click “Kick Device Out of Recovery”.

Please keep in mind from above method only lets you to downgrade iOS but can’t downgrade baseband version. (via iPhoneDownloadblog)

IMPORTANT: If you see this message in your console “Could not start TSS service on port 80 because you have something running on that port already!” Then TinyUmbrella cannot protect you!!! You must kill skype or teamviewer or whatever app is running and using port 80. When you run TinyUmbrella and that message does not appear, you are ready!

P.S Apple is still signing iOS 4.0.2, if you have mistakenly updated to iOS 4.1 then quickly RESTORE to 4.0.2 WITHOUT TinyUmbrella and WITHOUT Cydia in your hosts.

You May Like to Check out

Jailbreak iOS 4.1.

Jailbreak iOS 4.1 on iPhone 3G.

Jailbreak iOS 4.1 on iPod Touch 2G.

Snowbreeze 1.8 to Jailbreak iPhone 3GS iOS 4.1.

Posted in , , , | Tagged , , , , , , | 22 Responses
Sandip Dedhia

Sandip Dedhia

Sandip Dedhia is the founder of Blogsdna.com, he loves to write on technology, gadgets & web services. At Blogsdna you can read his Windows & freeware software related articles. He is on twitter too @sandipnd View author profile

  • TY

    I accidentally upgrade to 4.1 from 4.0.1 and have not backed up SHSH Blobs. How can I downgrade without a back up file? Thanks

  • nolan

    i am getting the port 80 error but i have nothing running, how do i fix it? thanks

  • Madcat

    Thanks!, saved me a lot of trouble.
    i accidentally upgraded to 4.1 when i tried a home-baked-firmware. Lucky me i had saved a shsh of 4.0
    i only succeed in restoring a original apple firmware, but that’s fine; Long live jailbreakme :)

  • KEVIN

    I upgraded to 4.1 and can’t get the SHSH Blobs. Does anyone else have the same problem?

  • the doors

    I accidentally upgrade to 4.1 from 3.1.3 on my iphone without jailbreak and have not backed up SHSH Blobs.my iphone is blocked i cant activate i dont have the original sim,How can I downgrade without a back up file e activate? Thanks

  • huserlamaniac

    works like a charms. ive been trying this for a while and nothing was working then i readed your thread and found out what i was doing wrong.
    i wasnt startin the tss

  • huslermaniac

    NOLAN turn off your firewall, antivirus. skype…

  • lee

    it wont do. after step 2 it says : CYDIA DOES NOT HAVE YOUR SHSH FOR iPhone4 4.0.1 (8A306) THERE IS NO WAY FOR YOU TO GET THEM. SORRY. YOU ARE JUST TOO LATE.

    and it didn’t even recognized my iphone 4 it was like this :
    lee’s iphone – INVALID X.X.X (XXXX)

  • Andre Vieira

    good, I upgraded my iphne to version 4.1 from version 3.1.2 and did not save anything, just did the upgrade. Anybody know if it is possible to explain myself if my iphone did save the shshs on my computer automatically?

  • khemchand

    I accidentally upgrade to 4.1 from 4.0.1 and have not backed up SHSH Blobs. How can I downgrade without a back up file? Thanks

  • khemchand

    CYDIA DOES NOT HAVE YOUR SHSH FOR iPhone3GS 3.1.3 (7E18) THERE IS NO WAY FOR YOU TO GET THEM. SORRY. YOU ARE JUST TOO LATE.

  • JAmes

    HEy having a problem…..gettting all the way to step 6 but when i press shift and open up the folder, inside the.shsh folder there is no file that i can choose with the same file type…PLease help

  • http://www.onlyonweb.com Rajeev

    I have successfully downgraded IOS 4.1 on unofficial locked iPhone 3GS to IOS 4.0.X or 3.x.y for that matter..

    A detailed guide is posted here…

    http://blog.onlyonweb.net/post/374

    Pls post comments/suggestions/questions..

    raj33v.

  • Michael Wood

    Does downgrading like this earse all user data or can you still restore it from your previous settings?

  • Abel Hernandez

    am doing everthing right but…
    when i try to restore i get error 3002
    can it be because my iphone 3gs is new??
    thank you!

  • grobbel

    I have got the typical problem of upgrading a jailbroken and unlocked 3GS. now it is iOS 4.1 and baseband 05.14.02. I realized jailbreak with greenpoison, but unlock with ultrasn0w is not working. Would it work once I downgraded to iOS 4.0.2 ?

  • Guestada

    same question as you but why dont u try it

  • Roco

    i did this , to down grade from 4.1 ,and now phone is completely dead and wont turn on, help

  • http://www.facebook.com/VietVuistheman Viet Vu

    how do i downgrade my iphone 3g from 4.1 to 4.0.1 without the shsh blobs?

  • Farsider

    no, downgrading the os, wont downgrade the baseband, the only way, is to use this software i believe, however i downloaded this software to do so, and i apparently am not getting the screen that is in this website “display shsh’s”

  • Hsggrg

    yes they suck shit
    hop ur listning assholes
    guy this willl just screw ur iphone

  • Bagchi_sid

    After entering DFU mode (shift restore) the selection box looks for *ipsw. i renamed .shsh to .ipsw but itunes says its incompatible.

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