downgrade iPhone 4 baseband?

Discussion in 'Jailbreaks and iOS Hacks' started by rumel1988, Nov 13, 2010.

  1. rumel1988 macrumors newbie

    Nov 13, 2010
    I'm already updated to iOS 4.1! now how can i downgrade to baseband 1.59.00?
    if i put SHSH Blobs file from another iPhone to my iPhone, then can I downgrade?
    if yes! please anyone give me previous baseband(1.59.00) SHSH Blobs file.
    please help.. :)
    thanks in advance..
  2. dhlizard macrumors G4


    Mar 16, 2009
    The Jailbreak Community
    Your answer lies in 3 words....cannot be done !

    You are stuck on that baseband. Never update your firmware until AFTER the jailbreak/unlock tools are released.

    Hashes cannot be shared, they are unique to each phone. Even if you had the hashes, you can not downgrade your baseband.
  3. bytethese macrumors 68030


    Jun 20, 2007
    Cranford, NJ
    Sorry, you are stuck. Baseband on iPhone4 cannot be downgraded. You also cannot "move SHSH blobs" to another iPhone.
  4. Carlanga macrumors 604


    Nov 5, 2009
    nope you can't downgrade the BB...
    Also, blobs are unique to each iPhone, so using one from another phone doesn't work.
    You are SOL for now...
  5. psml macrumors member

    Aug 22, 2010
    I am also in the same boat !!!
    Your only option is to wait for the new BB unlock tool release.

    I am using my device as a iPod now.
  6. rumel1988 thread starter macrumors newbie

    Nov 13, 2010
    Oh.. my luck. :(
    thank y'all for answer my question.
    anyway, which tool is best for unlock an iPhone 4?
    previously i was a iphone 2g user. and always use redsn0w on windows for jailbreak my iphone.
  7. Applejuiced macrumors Westmere


    Apr 16, 2008
    At the iPhone hacks section.
    For an iphone 4 that hasnt been updated to the latest 4.1 firmware you use ultrasnow to unlock. But in your case it will not work and you will have to wait for an updated version of ultrasnow maybe in the future.
  8. Carlanga macrumors 604


    Nov 5, 2009
    There is only ONE tool to unlock which is ultrasn0w and you download it from Cydia after you Jailbreak the device... There are various Jailbreak tools, but only one Unlock tool... Depending on the situation one decides what's best... For example right now w/ 4.1 the best Jailbreak Tool is PwnageTool (or an already baked Custom FW + Redsn0w) since that keeps your old BB so you can unlock it...

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