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Thread: Can I upgrade my iphone 3GS firmware, 3.0.1 - 04.26.08 to ios4?

  1. #1
    Arrow Can I upgrade my iphone 3GS firmware, 3.0.1 - 04.26.08 to ios4?
    I have a iphone 3GS with the following...
    Version: 3.0.1 (7A400)
    Firmware: 04.26.08

    Already jailbroken and unlocked in Feb using redsn0w 0.8 w/ iPhone2,1_3.0_7A341_Restore.ipsw
    I dont have at&t and need to keep it sim unlocked most importantly.

    Can I upgrade to ios4?
    Anybody know how exactly?

    Appreciate any help you can offer.

  2. #2
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    Do you have the new or old bootrom? New bootrom phones can't be jailbroken on 4.0/

  3. #3
    I assume old since I am untethered but not sure.
    f0recast says...

    Serial: (Starts with a number ends with NS)
    Baseband: 04.26.08
    Bootloader: 6.4
    Model: MB718
    Unlockable: YES (Use ultrasn0w)
    Tethered: NO

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