Jeff on iDB posted an article about the differences between Untethered, tethered and Semi-tethered jailbreaks. You have to fully understand these aspects to be able to jailbreak you iDevice in way you want.
Here you find a brief description of these words
Untethered Jailbreak *The Best*
The most desirable jailbreak of them all.
SemiTethered Jailbreak *Good*
Better than nothing. You can boot your device every time you want, but you get limited functionality. It means that you will not loose your phone in emergency cases such as battery drain.
Tethered Jalbreak *Bad*
The least desirable of the three. With a tethered jailbreak you cannot reboot your device at all without doing a tethered boot.
The iPhone DevTeam has update PwnageTool to ver 4.3.2 which support iOS 4.3.2 (Untethered). They recently update redsn0w to support iOS 4.3.2 but redsn0w can’t prevent baseband upgrade. Unfortunately iPad2 not supported in this version.
Ultrasn0w also update to version 1.2.2. You can install it via Cydia.
Only a few weeks after the 4.3.1 untether created by @i0n1c was released, Apple pushed out firmware 4.3.2. Thankfully, it appears Apple didn’t have a chance to fix the hole used by @i0n1c’s untether, so he ported his code over to 4.3.2’s kernel. Today’s redsn0w has been updated to include it. The 4.3.2 untether works on all devices that actually support 4.3.2 except for the iPad2: iPhone 3GS iPhone4 (GSM) iPod touch 3G iPod touch 4G iPad1
Only a few weeks after the 4.3.1 untether created by @i0n1c was released, Apple pushed out firmware 4.3.2. Thankfully, it appears Apple didn’t have a chance to fix the hole used by @i0n1c’s untether, so he ported his code over to 4.3.2’s kernel. Today’s redsn0w has been updated to include it.
The 4.3.2 untether works on all devices that actually support 4.3.2 except for the iPad2:
How to Jailbreak Your iPhone 4 Using PwnageTool (Mac) [4.3.2] Via iClarified
Same as newest version of redsn0w Sn0wbreeze 2.5.1 also released to support custom animated boot logo and some bug fixes. The jailbreak process is the same you can find the tutorials here. The new version also support iOS 4.3 on AppleTV 2G.
Change Log for sn0wbreeze 2.5.1
Cydia 1.1.1 is now pre-installed. iPhone 3GS users can now flash the iPad 06.15.00 baseband. Animate (Animated Boot Logos) by the Chronic Dev-Team is now supported. Added afc2 * Apple TV 2 is now fully supported. Added Apple TV 2 DFU Instructions. YouTube issues resolved on hacktivated devices. iPhone 3GS old-bootrom issues fixed (Error 37).
Dev -Team update redsn0w to version 0.9.6rc11 which added custom animated boot logo and some more bug fixes.
From the Dev Team blog,
Those running redsn0w may have noticed we enabled too many Settings options in some versions of the jailbreak (for instance, what you want your side switch to do, even if you have no side switch because you’re not using an iPad). Release rc10 of redsn0w corrects that (you can just run it over your existing jailbreak…be sure to de-select Cydia to avoid package conflicts). Along the way, we’ve also added the option to enable boot animations…these animations can be installed via Cydia, but be sure to select which animation to use via the Settings->Bootlogo setting after you’ve downloaded an animation (and again, you can just run rc10 rc11 over your existing jailbreak…be sure to de-select Cydia to avoid package conflicts).
Those running redsn0w may have noticed we enabled too many Settings options in some versions of the jailbreak (for instance, what you want your side switch to do, even if you have no side switch because you’re not using an iPad). Release rc10 of redsn0w corrects that (you can just run it over your existing jailbreak…be sure to de-select Cydia to avoid package conflicts).
Along the way, we’ve also added the option to enable boot animations…these animations can be installed via Cydia, but be sure to select which animation to use via the Settings->Bootlogo setting after you’ve downloaded an animation (and again, you can just run rc10 rc11 over your existing jailbreak…be sure to de-select Cydia to avoid package conflicts).
If you see the iOS timeline you found out this,
As one knows Apple called this Cat & Mouse game… (Tom & Jerry is better I think!) Read the rest of this entry »
Minutes ago @MuscleNerd via twitter confirms that the new @i0n1c exploit can also jailbreak the Apple TV 2G (ATV2).
I think that the new jailbreak tool will be available soon but I can’t find any reliable source to confirm the actual release data. What do you think about the release date?
DFU or Device Firmware Upgrade mode allows all devices to be restored from any state. Jailbreakers should boot their AppleTV 2G in DFU mode to load a custom firmware that created by pwnageTool or sn0wbreeze. Redsn0w and Greenpois0n also uses DFU mode to jailbreak the devices.
The Process
DFU mode doesn’t boot up the MAC OS on iPhone – therefore it doesn’t communicate with iTunes “as much” as in Restore mode and iTunes can’t decide to interrupt downgrading the firmware etc.
