I have a 4.0.2 iPhone 4 I can upgrade, right?

Discussion in 'Jailbreaks and iOS Hacks' started by palckofv, Sep 9, 2010.

  1. palckofv macrumors regular

    Joined:
    Nov 22, 2008
    #1
    I bought an iPhone 4 it came with 4.0.2 and it was too late to downgrade to 4.0.1 so I could jailbreak...the dev team blog is saying not to upgrade to 4.1, but that doesn't apply to me, correct? Since I'm not jailbroken now it shouldn't matter, right? Thanks for any help!
     
  2. palckofv thread starter macrumors regular

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    Nov 22, 2008
  3. err404 macrumors 68020

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    Mar 4, 2007
    #4
    I would get TinyUmbrella and save your SHSH just in case you ever need to go back to 4.02. It's good to at least have the option.
     
  4. Applejuiced macrumors Westmere

    Applejuiced

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    Location:
    At the iPhone hacks section.
    #5
    Can you still save 4.0.2 SHSH's?
     
  5. err404 macrumors 68020

    Joined:
    Mar 4, 2007
    #6
    You can save them. I did it last night from my wife's 3GS before upgrading to 4.1. However I can't confirm if you can actually restore using them.
     
  6. Applejuiced macrumors Westmere

    Applejuiced

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    #7
    If u save them u can obviously restore with them. But apple stops releasing them as soon as a new firmware version is out.
     
  7. moussekateer macrumors 6502a

    moussekateer

    Joined:
    May 12, 2009
    #8
    Don't upgrade if you ever want to unlock your phone, as 4.1 has a baseband update. If you don't care about unlocking (resale value etc) then upgrade away
     
  8. tempusfugit macrumors 65816

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    Chicago
    #9
  9. Kayan macrumors 6502

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    Location:
    CA
    #10
    Not only can you upgrade without updating your baseband, but I was under the impression from notcom's statements that it's also possible to downgrade the baseband while 4.0.2 is still being signed...Can someone verify this?
     
  10. Applejuiced macrumors Westmere

    Applejuiced

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    Location:
    At the iPhone hacks section.
    #11
    Nope, not Possible yet.
     
  11. Kayan macrumors 6502

    Joined:
    Jul 7, 2010
    Location:
    CA
    #12
    Actually it is...read his firmware blog after he explains on how to go to 4.1 without updating Baseband, then he explains it. It sounds like it won't be this way after Apple stops signing 4.0.2 software.
     
  12. Kayan macrumors 6502

    Joined:
    Jul 7, 2010
    Location:
    CA
    #13
    Quick question: can anyone think of a reason not to upgrade the baseband apart from being able to unlock it? I mean, since I'm planning on staying with ATT for a while, there's no reason to not update baseband.
     
  13. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #14
    I think you read it wrong.
    Yes, you can upgrade your firmware without updating your baseband version.
    No you cant downgrade your baseband once it has been updated.

    Unless you want to sell it unlocked next June-July and be able to move it faster and for more money.
     
  14. Kayan macrumors 6502

    Joined:
    Jul 7, 2010
    Location:
    CA
    #15
    Am I reading this wrong? This quote is directly from his mainpage, near the bottom:

    "I have heard a few folks voice concerns about how they can downgrade their 2.x baseband to 1.59.00 on iPhone4. Here are the basic steps:

    Close TinyUmbrella (if open)
    Close iTunes (if open)
    Remove ALL lines in your hosts file that contain gs.apple.com
    Windows: Start -> cmd -> ipconfig /flushdns
    Mac: Terminal -> dscacheutil -flushcache
    Start iTunes
    Restore (NOT UPDATE) Stock 4.0.2 iPhone 4 - 4.0.2 Download
    Note that this will only work while Apple is signing 4.0.2 SHSH requests. This is due to the way Apple now updates/restores Baseband Firmware for the iPhone 4 different from the way it did to prior devices. Lucky us..."

    This seems to tell me that you can still downgrade baseband if you've already updated it...Right?
     
  15. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
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    Location:
    At the iPhone hacks section.
    #16
    Oh I see.
    Its a Yes and a No though.
    As soon as Apple stops signing official 4.0.2 even with SHSH's saved you will not be able to downgrade the baseband.
    Thats only for that small window between firmware releases that Apple still signs 4.0.2 for a day or 2 even though 4.1 is out.
     
  16. Kayan macrumors 6502

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    Jul 7, 2010
    Location:
    CA
    #17
    There is indeed a timeline, as I said before...:)
     

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