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Thread: newer iPhone 3Gs downgrading

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3G[S] Downgrading

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Jailbreak / Downgrading / Upgrading

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OK so I originally posted in the T-mobile forums: http://modmyi.com/forums/t-mobile/79...phone-3gs.html But I figured out where I went wrong. The original instructions I had told me that as long as the
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  1. #1
    What's Jailbreak?
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    Default newer iPhone 3Gs downgrading
    OK so I originally posted in the T-mobile forums:

    Problem using T-mobile prepaid on iPhone 3gs

    But I figured out where I went wrong.

    The original instructions I had told me that as long as the last TWO numbers of the serial were less than 35 I would be OK but now I'm reading that the last THREE numbers need to be less than 135.

    So I have an iPhone 3Gs with version 5.0.1 and a serial number with the last 3 numbers as 929...

    I've tried everything... How do I get this thing working with T-mobile??

  2. #2
    iPhone? More like MyPhone
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    Post ur first 6serial...... Dont want to tell u ok to flash to ipad baseband that could brick u phone.

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    88929... I also put the phone in DFU mode and went into system profiler and double checked that it was the old bootrom which it was.

    Got it working though! Here's what I did for anyone who wants to know or comes to this post looking for answers... Also I have a question regarding errors with ultrasn0w at the end.

    Here's my specs:

    iPhone 3GS
    Version 5.0.1
    Baseband 5.16.05
    Serial 88929 (old bootrom)
    Carrier: T-mobile prepaid

    I downloaded the following:

    -Pwnage tool 4.1.3
    -iPhone 2,1 4.1 IPSW
    -iPad 1,1 3.2.2 IPSW
    -Tiny Umbrella

    I first opened the file /etc/hosts and added the following to the bottom of the file:

    74.208.10.249 gs.apple.com

    I ran Pwnage tool to create my custom ipsw and flash to the new baseband.

    I did a custom restore with the custom ipsw Pwnage tool just created. Then when the 1015 error came up I used Tiny umbrella to exit recovery mode.

    Then I installed ultrasn0w on my iPhone from the Cydia app.

    It's funny because ultrasn0w actually showed a bunch of errors and I thought I ran into another failed attempt like I had been having for 2 days but as soon as I returned to Cydia I got a text message which meant it worked. So as of right now I haven't touched anything cause I don't want to fix what ain't broken!

    Does anyone think that will cause a problem down the line?

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