iPhone Downgrading BB 06.15.00 to 5.13.04 iPhone 3GS for Factory Unlock AT&T

Discussion in 'Jailbreaks and iOS Hacks' started by ShriksR, Jul 17, 2013.

  1. ShriksR macrumors newbie

    Joined:
    Jul 17, 2013
    #1
    Downgrading BB 06.15.00 to 5.13.04 iPhone 3GS for Factory Unlock AT&T
    Hi,
    I have iPhone 3GS running on iOS 5.0.1 on BB 06.15.00. So i want to factory unlock my iPhone 3GS. But an iPhone 3GS must have BB 5.13.04 to have factory unlock in BB 06.15.00 it does not work. So i have to downgrade my BB. So the steps i did is:
    1)i downloded iOS 5.0.1 IPSW and redsn0w 0.9.14b2
    2)then i ran redsn0w>extras>select ipsw>i browse the ipsw and opened>it asks about old or new bootroom ithink so mine is old so i hit on no>it showed it sucessfully identified>went back>hit jailbreak kept my phone off n followed on screen instruction>unchecked intsall cydia and checked downgrade ipad BB>i kept it in DFU mode then suddenly a message appears "CONNECTED DEVICE DOES NOT SUPPORT UNTHETHERED JAILBREAK". So how should i downgrade my BB please help me i want to factory unlock n update my 3GS to iOS 6.1.2 :(
    Mine serial no. 3-5 digit no. is 019 so is my 3GS an old bootroom or new please help
    Thanks
     
  2. idenRen macrumors newbie

    Joined:
    Oct 2, 2012
  3. ShriksR thread starter macrumors newbie

    Joined:
    Jul 17, 2013
    #3
    So when i select its new bootrom the jailbreak will work n i can downgrade BB but it safe on new bootrom device to downgrade thats the question it will not brick the radio of my phone if i downgrade?
    Thanks
     

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