While the team did not specifically mention it, the advice might also be an indication that a jailbreak for iOS 9.2.1 is soon to arrive, since fans will need to have the same build of the official iOS when converting to its jailbreak version. It seems, however, that it is a tough guy to crack as no words yet is heard from popular jailbreakers Pangu 9 and TaiG. Those whispers were focused on another milestone upgrade, an iOS 9.3 update that would follow in the footsteps of iOS 9.1 and iOS 9.2. Good news for jailbreak fans is that the hacker was reportedly able to run an untethered jailbreak version of the iOS in the Apple device. For those who opt to use iPhone, iPad and iPod Touch devices without the company's software restrictions, however, they can only jailbreak previous versions iOS 9.0, iOS 9.0.1 until iOS 9.0.2. This has frustrated the jailbreak users, and all our hopes for an iOS 9.3 jailbreak or even an iOS 9.2 jailbreak are dying away.
The video is pretty convincing, though the hacker "qwertyoruiop" has kept his purported untethered jailbreak solution to Apple's security patches to himself, rather than really prove to the community that he's broken iOS 9.2 through iOS 9.3 beta.
Windknowm, a core developer for Pangu, the biggest jailbreak company in the world, recently published a technical article explaining the security and vulnerability fixes found in iOS 9.2 and iOS 9.2.1.
If you're already on a version of iOS that can be jailbroken, then we strictly advise you to not update at any cost, as you'll lose the jailbreak altogether. Rumors are rife that, should everything goes according to plan, the developer will be dropping the iOS 9.2.1 jailbreak any moment now. Does that mean we can expect a jailbreak for iOS 9.2.1?
It has also been reported that downgrading to iOS 9.2 on iPhone or iPad is no longer achievable as Apple closed the signing window for iOS 9.2.