Originally posted by iisuG
I had an iPhone whit the 3.0 jailbreake and then i Upgreadet it to 4.2.1 and now it isnt working anymore..!
What is the PROBLEM ????
Please HELP me i realy NEED HELP
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Originally posted by another user
Update #2: The notion of a “tethered” jailbreak is pretty new to many people, so here’s a quick rundown on what to expect:
1. If you’re on an iPhone3G, old-bootrom iPhone3GS, or non-MC ipt2g, life is easy. redsn0w installed an untethered jailbreak and so nothing below applies.
2. “Tethered” does not mean you cannot boot at all without PC/Mac assistance. If you have not installed any tweaks that hook into important programs like SpringBoard or CommCenter, your device will actually boot. However, jailbreak programs like Cydia won’t work (and Cydia may still have a white icon). Also, certain built-in apps that had to be moved by Cydia will fail (Safari being the most noticeable example).
3. If you’ve installed MobileSubstrate tweaks that hook into SpringBoard or other important programs, your boot will actually fail (you’ll get stuck at the Apple logo). You need to use redsn0w to “Just boot tethered right now”.
run redsn0w and boot tethered just now.
you will have to do this everytime you reboot.
to untether just run greenpoisons latest release.
should help