Hacker and unc0ver lead developer Pwn20wnd issued at least three more revisions to the unc0ver v2.2.0 pre-release since our last coverage, with each revision bringing fresh bug fixes and performance improvements to make the jailbreak experience as smooth as possible for users.

Citing the changelog published on Pwn20wnd’s official GitHub page, those three revisions encompass the following changes:

01/22/2019 – v2.2.0~b6 was released for public testing with the following changes:

– Performance improvements

01/22/2019 – v2.2.0~b7 was released for public testing with the following changes:

– Makes experimental changes to the empty_list (VFS) exploit to improve the reliability of it (Credits to @GeoSn0w for the tip)

01/23/2019 – v2.2.0~b8 was released for public testing with the following changes:

– Fix switching from Electra without restoring root filesystem

A Tweet shared by Pwn20wnd shortly after releasing the seventh revision appears to ask Twitter if they’ve noticed any reliability differences in the VFS exploit since testing. On the other hand, there appear to be mixed results:

Notably, these revisions do not add support for @S0rryMyBad’s new iOS 12-centric kernel exploit. It seems more likely that this would be integrated in an entirely new version of unc0ver than in a beta revision.

As a reminder to developers, unc0ver v2.2.0 drops support for Substitute in place of Cydia Substrate, so Pwn20wnd recommends adjusting your jailbreak tweaks to meet this criteria:

As with all the pre-release revisions that we’ve kept you in the loop of, these three are still betas and should not be deployed on all handsets. This release is only intended for experienced jailbreakers or developers with knowledge of the troubleshooting steps required to handle potential bugs and instabilities.

If you aren’t comfortable using a pre-release version of unc0ver, then we advise you to use the latest official public release (v2.1.3) instead; it too can be downloaded from Pwn20wnd’s official GitHub repository.

Unc0ver is a semi-tethered jailbreak just like Electra, which means you must re-run the tool after every reboot. That aside, it bundles a newer iOS 11-optimized build of Cydia that sports the official seal of approval from Saurik.

If you don’t know how to use unc0ver, then you can follow our in-depth tutorial about how to install and run the unc0ver jailbreak. The unc0ver jailbreak supports all devices that run iOS 11.0-11.4 beta 3. Should you run into any problems while using unc0ver, you can report bugs to the developer here.

As Pwn20wnd’s bug report list grows thinner, we can only expect that a public release will ensue very soon. As always, we’ll keep you updated as this happens.