Five days before the expected introduction of iOS 11 via WWDC 2017 that will start June 5, Apple made available beta 2 of iOS 10.3.3 and it's ready for public testing. The update when it becomes official will be loaded with security improvements and bug fixes. Will it turn out a dreaded jailbreak killer?

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So far, there are no earth-shaking changes seen with the firmware, indicating that the official release is chiefly meant to boost the software's security features. "No significant features or notable bug fixes were found in the first beta, suggesting iOS 10.3.3, like iOS 10.3.2, is an update that's minor in scale and designed to introduce security improvements and address bugs," MacRumors reported.

In case it matters, there's a new set of wallpapers that are optimized for the 12.9-inch iPad Pro that Apple has included with beta 1. This means the same feature will become official when iOS 10.3.3 is made public, which is expected to happen at the same time iOS 11 is announced. And that will be on June 5.

Now to answer the question if firmware 10.3.3 is a jailbreak killer, most likely it is. To be sure, the version will still include the new File System APFS that reportedly is now the formidable wall that keeps hackers at bay. Rumors said APFS, which replaces HFS+ starting with iOS 10.3, was what prompted Yalu jailbreak maker Luca Todesco to quit from public jailbreaking.

And APFS is the likely the reason too that the rumored Pangu iOS 10.3 jailbreak failed to materialize. The Chinese hacking was reported to provide the solution at the start of May or right after the official rollout of iOS 10.3.2 but nothing came out of it. But some still hope that once iOS 10.3.3 is released and Apple shifts its focus on iOS 11, jailbreak creators will finalized whatever they are working and provide a step up of jailbreak tools.

Currently, jailbreak fans can use Todesco's Yalu102 and Yalu1011 solution. The former got stuck with beta 7 and will not work on iPhone 7 and most 64-bit devices. The latter is now replaced by extra_recipe+yalux and at present in beta. It is a tool designed exclusively for the iPhone 7 series.

Reports said a KPP exploit will be released to the public in August that hopefully someone will pick up and make a working iOS 10.3.x jailbreak out of the bug. So it might be when that happens, the rumored Pangu iOS 10.3/10.3.1 jailbreak will be finally released or Todesco and any other security researchers their version of the same jailbreak.