What a Tethered Jailbreak for iOS 4.2.1 Means

What a Tethered Jailbreak for iOS 4.2.1 Means

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An explanation of what a tethered jailbreak is and what it means for those looking to jailbreak iOS 4.2.1, courtesy of the iPhone Dev-Team.

● 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.

● "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).

● 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".

Hopefully @comex will be able to untether the iOS 4.2.1 jailbreak soon!

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What a Tethered Jailbreak for iOS 4.2.1 Means

nick - January 4, 2011 at 2:21pm
hey i have a problem with my ipod touch 4g i think. after i jaibroke it with redsn0w because i have 4.2.1, my cydia app is now white and i can\'t open it up or safari. then i opened up redsn0w again to do the tether boot up thing and everything goes well until the screen says: waiting for reboot and my ipod isn\'t rebooting. someone please help i\'m really a n00b at doing this. and i tried to downgrade it using tiny umbrella and that goes well during the downgrade process but at the end it just says an error occurred saying error 1606 or something like that. thanks for all of the help i really appreciate it.
Anudeep - December 1, 2010 at 1:19pm
Hello All, I am stucked with apple logo at boot time. I dont want to boot tethered everytime if i restart using PC, what should i do ? Thanks in advance
Anudeep - December 1, 2010 at 1:53pm
I was checking other comments in this page, currently i should install springboard for manual restarting(which i don\'t want) but for shutdown and starting again only solution is to use redsnow with PC...And can any one tell me when untethered jailbreak for ios 4.2.1 will be released ? Is there any alternative other than connecting to PC ?
ltlredx - November 25, 2010 at 3:56pm
I agree w/ the person who stated this leaves more Qs than As. I\'ve had my iPhone about a year & still don\'t feel comfortable enuf w/ the information provided to jailbreak my device. I don\'t want to jump into a \"try this\" situation & then find out another option would have been better. I\'ve been looking for a comparison of the major jailbreaks available so I can make an informed decision but have not been successful in my search. If anyone knows of a good explaination of the differences (pros & cons) of each, please post a link!
Frank - November 25, 2010 at 10:45pm
There are no different jailbreaks. They are all using the same exploit and accomplishing the same task. Some of the tools provide extra features like allowing u to auto install packages or prevent a basement update. Basically if dont need an unlock and need a jailbreak right now and are willing to deal with the hassle of reconnecting to the computer if your phone is powered off, then jailbreak now. Otherwise stay on your current firmware and wait until untethered jailbreak is released.
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