The first public beta of Uncover 3.0 that supports jailbreaking iOS 12- iOS 12.1.2 was released yesterday by @pwn20wnd team. Although the process to jailbreak iOS 12-iOS 12.1.2 with Uncover is straightforward, there are still many iPhone users, encountering a soft brick with their device. If you are in the same trouble, then read on this post to check out some fixes to solve the issue.
Even when you do not jailbreak your iPhone, we still recommend you to make sure you pay attention to all the warnings below so that your iPhone does not end up boot loop issue.
Solutions to fix boot loop issue when using Unc0ver jailbreak
Delete OTA File
The first method you should try is to delete any iOS 12 OTA file on your iPhone/iPad before using the jailbreak. If not, it will cause a boot loop.
You can check the OTA file on your iPhone by heading to Settings -> General -> Storage and look for the “OTA Update” file. If there is one, delete it. After that, restart your iOS device and use unc0ver tool to jailbreak your device.
Use Unc0ver b31 or Lower version
You should not use the latest b32 version of Unc0ver to jailbreak your iOS device. That’s because there are bugs that can end up putting your phone into a boot loop. So, you should use the b31 or a lower version since many users managed to successfully jailbreak their device at the first try without any problems.
Disable Reload System Daemons
If the boot loop issue occurs whenever you try installing new tweaks from Cydia app or during the jailbreaking process, you should disable Reload System Daemons option, which can fix the boot loop problem. But, if you intend to use Unc0ver b32 tool, you should enable this option back on once you successfully jailbreak your iPhone/iPad.
Cydia Keeps Crashing
If Cydia keeps crashing on your iPhone after a successful jailbreak, you should restart your iOS device and enable Airplane mode. After that, launch the Unc0ver app on your phone. From here, toggle off the Reload System Daemons option. After that, try to re-open Cydia. If it does not work, jailbreak your iPhone/iPad again with Unc0ver app. Once your iOS device reboots, Cydia will work properly.
Fix Boot Loop Issue While Using Unc0ver Jailbreak On Your iPhone
If your iPhone/iPad suddenly encounters a bootloop state while using Unc0ver tool to jailbreak your device, the only option is restoring your iOS device. However, you should make sure that your iPhone is already in the booloop state and is not in a respring loop. Simply follow these steps below.
Step 1: Press and hold the Volume Up button and then the Volume Down button.
Step 2: Next, press the Power button. Keep all of them pressed for a few seconds until it reboots and the Apple logo shows up on the screen.
If the above steps does not work, then you should restore your iPhone through DFU mode. However, you need to downgrade your iPhone/iPad to iOS 12.1.1 beta 3 version since Apple has stopped signing older iOS versions. You can download iOS 12.1.1 beta 3 IPSW file from here.