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Thread: Upgrading 3GS from 3.1.2 to 4.0.1

  1. #1
    Default Upgrading 3GS from 3.1.2 to 4.0.1
    I have an iphone 3gs ios 3.1.2 jailbroken using blackrain. I want to upgrade it to ios 4.0.1 and jalibreak it using jailbreakme.com. I have shsh saved for 3.1.3, 4.0 and 4.0.1. I need step by step guide please

  2. #2
    Retired Moderator iYeow's Avatar
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    Download the 3GS, 4.0.1 ipsw from here :
    iClarified - iPhone - Where To Download iPhone Firmware Files From
    PC : Run Notepad as Admin and open up to your hosts file .
    CWindows\System32\Drivers\etc\hosts and add this line to the very bottom : 74.208.10.249 gs.apple.com
    save it and reboot your pc
    Now having your iphone pluged in, Do the Shift key + Restore ( Itunes)
    and browse to 4.0.1 which you have downloaded.
    Let it restore, it should restore if you have shsh blogs with Cydia.
    Once restored , jailbreak with jailbreakme.com

  3. #3
    Thanks for your response. One more thing please. When i open that hosts file it has local host at the very bottom which is without "#" sign.Does it matter? And will i be able to unlock my iphone after jailbreaking it?

  4. #4
    Retired Moderator iYeow's Avatar
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    Can you temporarily check all with # infront and just leave the ip address i mentioned above so as to avoid conflict.
    Yes, you can still unlock with Ultrasn0w at 4.0.1.

  5. The Following User Says Thank You to iYeow For This Useful Post:

    Jaddy06 (2010-09-26)

  6. #5
    when i restored my iphone. its in recovery mode. what should i do now?

  7. #6
    Retired Moderator iYeow's Avatar
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    If you are getting error 1015, use kick out of recovery from tiny umbrella. You should be in emergency screen

  8. #7
    i am not getting any error number but yes i am in emergency screen and also in recovery mode. how can i kick out of recovery using tiny umbrella?

  9. #8
    Retired Moderator iYeow's Avatar
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    If you see a slider, you are in emergency. You need an official sim to trigger into springboard .
    I thought you already knew this part called activation

  10. #9
    yes i see the slider but i cannot arrange to have an official sim so please tell me some other way to put it out of recovery

  11. #10

  12. #11
    when i open that device instance id it gives me the following details

    USB\VID_05AC&PID_1227\5&28E271E&0&3.

    ok i managed to check it on my laptop and i have old bootrom. What can be done now? And my phone is in dfu mode now

    Finally i arranged the official sim and my phone is working fine on ios 4.0.1. Thanks for the help
    Last edited by Jaddy06; 2010-09-27 at 08:12 PM. Reason: Automerged Doublepost

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