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Thread: downgrade from 5.1

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I am trying to downgrade my iPhone 4 from 5.1 firmware to 5.01 or 5.0. I am using redSn0w to create a No_BB custom ispw. I keep getting this weird
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    Default downgrade from 5.1
    I am trying to downgrade my iPhone 4 from 5.1 firmware to 5.01 or 5.0. I am using redSn0w to create a No_BB custom ispw.
    I keep getting this weird error message that makes no sense to me. "This option can only be used for iPhone 3GS or iPhone 4 ISPWs"

    But I have an iPhone 4... so what am I doing wrong.

    The file is iPhone3,3_5.01_9A405_restore.ispw

    I had my phone jailbroken for a while, and then I restored it because I was having some software issues, and I was too lazy jailbreak again... and now, my desire for a modified phone is back, but I can't do much with 5.1. I am trying to downgrade so I can do fun things.

    any help is much appreciated.

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    Cheers,

    I am also having this issue. I am trying to downgrade from 5.1 to 5.0.1.
    However, my file name is iPhone4,1_5.0.1_9A405_Restore.ipsw
    I am currently running on the tethered jailbreak of 5.1.

    Please advise.

    Thank you!

    - Josh

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    Do y'all have the shsh blobs saved if ya don't you will not be able to downgrade to that.

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    Cheers,

    I was under the impression (and quite possibly the wrong impression) that the SHSH blob was saved automatically by redsn0w when I did my jailbreak. I used TinyUmbrella to locate my SHSH from Cydia. Under TinyUmbrella, it states that I have two saved SHSHs.

    1. iPhone4CDMA 5.0.1 (9A405)
    2. iPhone4CDMA 5.1 (9B176)

    Thank you for a speedy reply.

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    Welcome

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    Quote Originally Posted by Deigo73 View Post
    Cheers,

    I am also having this issue. I am trying to downgrade from 5.1 to 5.0.1.
    However, my file name is iPhone4,1_5.0.1_9A405_Restore.ipsw
    I am currently running on the tethered jailbreak of 5.1.

    Please advise.

    Thank you!

    - Josh
    That IPSW that you have according to the file name is infact the Ipsw for the iPhone 4S GSM...

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    Quote Originally Posted by 2k1 View Post
    Welcome
    I'm sorry, but I'm still having an issue. I don't know how to downgrade. I was browsing some other forums and came across a post that mentioned I should do the following steps:

    1. Backup my device (done)
    2. Download latest version of TinyUmbrella (done)
    3. Run TinyUmbrella (done)
    4. Using TinyUmbrella, press 'Start TSS Server' and choose my SHSH. I chose my 5.0.1 SHSH but I get an error. My error reads, "The iPhone "Curtner's iPhone" could not be restored because the firmware file is not compatible."

    I hate feeling so ignorant when doing something so simple. Is the file I need to select the iPhone4,1_5.0.1_9A405_Restore.ipsw file? Or should I be looking for something else?

    Thank you for guidance!

    EDIT: Susty...How would I have obtained an iPhone 4S GSM SHSH while jailbreaking with an iPhone 4 on Verizon? Am I SOL?

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    For your phone, you want one called

    Iphone3,3_5.0.1_9A405

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    Interesting.

    My *.ipsw file says 4,1_5.0.1_9A405
    My *.shsh file says 3484041129230-iphone3,3-5.0.1.shsh

    However, I cannot select the *.shsh file when shift+clicking restore in iTunes when using TinyUmbrella. Please tell me I'm not overlooking something so incredibly stupid.

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    You have to stitch the Ipsw to the firmware first, however your using THE WRONG FIRMWARE You have one for an iPhone 4S and you have an iPhone 4 CDMA... This is why you have the error about being for the wrong phone.

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    Well that's no good. Is there a way to get the correct firmware now that I'm already 5.1 and they're done signing 5.0.1 (I don't even know what that means).

    And also, how would I have gotten the iPhone 4S firmware to begin with if the only way I obtained my SHSH is through jailbreaking?

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    You've obtained an iPhone 4S ipsw, you HAVE iPhone 4 shsh's...

    You need the correct Ipsw for the correct phone as the iPhone comes in gsm & CDMA versions... Neither are compatible with the other.

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    I understand what I have and what I need. My concern now is whether or not the file I need is still obtainable. Do you know if it is?

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    Quote Originally Posted by Deigo73 View Post
    I understand what I have and what I need. My concern now is whether or not the file I need is still obtainable. Do you know if it is?
    Direct from the Apple servers, 5.0.1 for the Iphone 4 CDMA
    http://appldnld.apple.com/iPhone4/04...5_Restore.ipsw

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    Quote Originally Posted by Susty View Post
    Direct from the Apple servers, 5.0.1 for the Iphone 4 CDMA
    http://appldnld.apple.com/iPhone4/04...5_Restore.ipsw
    Thank you for your help and patience.

    I now understand that I somehow obtained an iPhone 4S firmware that I don't need since I use an iPhone 4.

    I stitched my 5.0.1 SHSH file to my 5.0.1 IPSW that you linked me. I ran into a few errors along the way and navigated through a few others. In the end I was unable to downgrade my device. I'm sure it is possible, but working 75hrs a week makes it hard for me to find the time to sit with my phone and figure it out on my own. I will work on it this weekend.

    Again, I thank you for your help.

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    Quote Originally Posted by Deigo73 View Post
    Thank you for your help and patience.

    I now understand that I somehow obtained an iPhone 4S firmware that I don't need since I use an iPhone 4.

    I stitched my 5.0.1 SHSH file to my 5.0.1 IPSW that you linked me. I ran into a few errors along the way and navigated through a few others. In the end I was unable to downgrade my device. I'm sure it is possible, but working 75hrs a week makes it hard for me to find the time to sit with my phone and figure it out on my own. I will work on it this weekend.

    Again, I thank you for your help.
    No worries at all squire If you want some help with it when you do get the time, just give us a shout & sure can figure out what the errors are

    Have a good day

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    Hello can you help me aswell?

    I Have a iphone 4 running GSM I think , (if thats the standard) and I want to get 5.0.1 on my phone and jailbreak it.

    Should i first upgrade to 5.1 then downgrade to 5.0.1 or can i upgrade 4.1 to 5.0.1 ?

    whats the file url for the 5.0.1 GSM at the apple servers?

    Will i lose my base band if i upgrade to 5.0.1 and jailbreak it? (its locked now)

    But i have jailbroken it now and it works (with service and base band)

    Please help

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    Do you have the blobs for 5.0.1? And what baseband do you have. Sounds like ya may have to perserve that baseband.

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    What are blobs? and how i get them?

    Device Model: iPhone 4
    Installed Firmware Version: 4.1
    Installed Baseband Version: 02.10.04-ICE_2_8

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    Tiny umberalla will show ya the blobs ya have saved

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