Jailbreaking 4.2.1

Discussion in 'iPhone' started by macuserjhs, Jan 17, 2011.

  1. macuserjhs macrumors regular

    Nov 4, 2010
    I have an iphone 4 running 4.2.1 and i want to jailbreak. But i am reading about tethered and untethered. And i was just wondering what these mean and what the differences are. Thanks
  2. Krandor macrumors 6502

    Jul 15, 2010
    Tethered means anytime you reboot your phone or kill the battery you have to reapply the jailbreak.
  3. eawmp1 macrumors 601


    Feb 19, 2008
  4. hockeyhammer macrumors regular

    Mar 3, 2009
    I had the same issue this weekend with my 4th gen iPod Touch, but i backed it up and went for it. No regrets! I'v only had to boot it with redsn0w twice (once because an app I installed required a restart and once because an app crashed and shut down my iPod) and it wasn't that painless. I'm only a little worried that if I have it away from home and it shuts down I'm screwed. Good luck. :apple:
  5. macuserjhs thread starter macrumors regular

    Nov 4, 2010
    Is it possible to jailbreak 4.2.1 untethered. And also say it does drain my battery or runs slower and what not, when i restore it will it go back to normal? or would it be permanent?

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