Jailbreak your iPhone

Guide to Update iPhone 4 to iOS 4.2.1 While Preserving Baseband 1.59.00


Earlier today we posted a guide to Jailbreak iPhone 4, iPhone 3GS iOS 4.2.1 with Greenpois0n RC5. As you know Greenpois0n requires your iDevice on stock iOS 4.2.1 and those who rely on ultrasn0w unlock must stay away from Greenpois0n jailbreak.

Fortunately Notcom, guy behind firmware umbrella discovered a method to preserve your iOS 4.0.1 / 4.0.2 baseband 1.59.00 while updating to iOS 4.2.1 (iPhone 4 only). Notcom released the latest version of Firmware Umbrella with this useful feature. Following are the instructions so you can update your iPhone 4 to iOS 4.2.1 and use greenpois0n without loosing the ability to unlock. You can download the latest version of firmware umbrella from official site http://thefirmwareumbrella.blogspot.com/

Instructions :

Step One : Close iTunes, Skype, Messengers or any other background application.

Step Two : Launch Tiny Umbrella and connect your iPhone 4

Step Three : Hit the Start TSS Server button.


Step Four : Now launch iTunes and  restore to iOS 4.2.1 (download here)

Note : do a *Restore*  not an *Update*

Step Five : Cross your fingers and wait for iTunes to end up with error 1013. This is perfectly normal and has to do with the baseband not being updated.

Step Six : Simply ‘Kick Device Out of Recovery and that’s it. Now you can follow our guide to Jailbreak iPhone 4, iOS 4.2.1 with Greenpois0n RC5 

Note : if Tiny Umbrella Fails to kick your device out of recovery mode than ran greenpois0n and that’s it.


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Comments ( 9 )

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  1. Alvin February 8, 2011 Reply

    I keep on getting the 1604 error no matter what I do. I have an iphone 4 on 4.1 with baseband 1.59.00. I’ve tried restoring on a mac, windows machine and another mac but I keep hitting the same problem. I tried doing it both in DFU mode and recovery mode but still the dreaded 16xx error. I hope someone can help me with this. Thanks in advance.

  2. Luay February 7, 2011 Reply

    How can I unlock iPhone 3GS (old bootrom)running 4.1 with old baseband (05.11.07) ..? I have it unlocked on 4.1 … but if I want to upgrade to 4.2.1 .. how can I preserve the basebane and unlock it? I used to use Sn0wbreeze to unlock it while preserving the old baseband … now sn0wbreeze is not released anymore!
    Help/Suggestions are appreciated …

  3. ulim February 6, 2011 Reply

    iPhone 4 stuck for 3 hours in restore mode. Back to restoring the original iOS. Greenp0ison does not load the loader app. no harm done either.

  4. alpitt February 5, 2011 Reply

    This method does work!

    Do not kick the ios device out of recovery instead when it is on the recovery screen pt it into DFU mode.

    Then run the latest Greenpois0n and when your device reboots it will be ready to activate via itunes.

  5. CJ February 5, 2011 Reply

    well it worked for me in just one try just wait for 1013 error and ur baseband is not updated. after that u will be on recovery mode. the last thing to do is to run the gpoison then ur good for more helpmgo to utube and search for dinozombas

  6. mike February 5, 2011 Reply

    here is a video tutorial: http://www.youtube.com/watch?v=o6dAHvBtnrc

  7. Hakim February 4, 2011 Reply

    I keep getting a different – 1604 error and my iOS is not being updated.

    @visazifta in TinyUmbrella select your iPhone on the left under “Recovery Devices”. This will allow you to hit the “Exit Recovery” button.

  8. vistazifta February 4, 2011 Reply

    im actually getting a 1013 error am curious y and i cant kick out recovery

  9. Hamada February 4, 2011 Reply

    This method does not work so wait for pwangetool to be released by dev team

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