Before downloading and installing any iOS update, majority of jailbroken iDevice users would first research whether a jailbreak is available or not for that particular update. And with the recent public final release of Apple iOS 6 - we have once again had to make the decision whether to upgrade or not from a "jailbrokenability" point of view ?
And the answer is - "Do not upgrade if you have A5 chip based iDevice (like Apple iPhone 4S) as there is no iOS 6 jailbreak for them yet, and if you have an A4 chip based device like Phone 4, iPhone 3GS and iPod touch 4th you can have an tethered jailbreak for now.". While it is strongly advisable NOT TO UPGRADE to iOS 6 if you want to retain your jailbreak, the process to jailbreak A4 devices and manually installing Cydia is posted after the jump with details of announcement by iPhone Dev Team on the topic.
* This a tethered jailbreak, and is limited to A4 devices only. No untethered jailbreak is available for iOS 6 yet.
* You jailbreak iPhone 5, iPhone 4S, iPad 2, iPad 3 and iPod touch 5th-gen using this method.
* Do not update to iOS 6 if you have your device unlocked.