BigBoss, which is one of the iOS jailbreak more known developers, had just posted a new update on his blog. He had just released a new semi-tethered jailbreak for iOS5 which allows you to jailbreak iPhones, Ipods and Ipads (not including iPhone 4S and iPad 2).
As the “semi-tethered” jailbreak is a new term let us try to explain it:
A Tethered jailbreak means that your Apple iOS device (be that an iPhone, iPod or iPad) will remain “jailbroken” forever, regardless of reboot and power cycles. The only way to undo it is to flash a new rom version to your device. This is the most stable and permanent jailbreak method in existence.
An un-tethered jailreak means that whenever you reboot your iOS device – it will be “jailed” back again and you won’t be able to use it again without connecting it to a computer and re-applying the jailberak (i.e. redsn0w).
The new term – Semi-Tethered jailbreak means that the if the device reboots or has any power recycle done to it then the jailbreak will be gone BUT you will still have access to its core functions and be able to use it until you can re-apply the jailbreak via a pc. This actually means that if you are on the road and not near your computer and have a power issue or a reboot on your device, you will still be able to make phone calls, send messages and emails and use it partially until you are back near your pc.
These are the functions you will be able to use in such a situation:
1) You can use phone+ send sms
2) You can use any appstore app freely.
3) You will bot be able to use mail app but you can simply install a gmail app from appstore or such instead.
The semi-tehtered jailbreak is a much better solution for most of us as the risks of rendering your device useless (when you’re not near a computer) are much less.
The new jailbreak patch is available via Cydia under the http://thebigboss.org/semitether. Just add that as a source to your Cydia and install the patch.
Note that this procedure might be risky so if you do decide to follow it you are doing it on your own and only you will be held responsible for any damage caused.