We highly recommend using the Online method to Uncover Jailbreak.
You can install unc0ver Jailbreak IPA directly from the zJailbreak (The World’s most popular 3rd party app store)
Step 01 – Open the zjailbreak and download Uncover IPA to your device. Once download the app trust the developer profile. Go to settings > device and profile management > trust the developer profile.
Step 02 – Now run the Uncover app. Tap the Jailbreak button and go ahead with the Jailbreak process.
Step 03 – It will take a little time to complete the Jailbreak process. After reboot your device, you can see the Cydia icon available on your iOS 12.4 device.
Step 01 – Just tap above uncover IPA button and Cydia impactor button to install both on your computer.
Step 02 – Connect your iOS 12.4 device to computer and open Cydia impactor.
Step 03 – Drag and Drop the Unc0ver IPA into Cydia impactor window.
Step 04 – You need to provide your Apple ID and PW to start the side load process.
Step 05 – When the sideload process complete you can see the Unc0ver IPA on your device homescreen.
Step 06 – Before open the Unc0ver app, trust the developer profile going through the device settings.
Step 07 – Now launch the Unc0ver Jailbreak app from your iOS 12.4 device and tap jailbreak button to start the Jailbreak process.
Step 08 – Wait for few seconds until Jailbreak process compte and Finally Cydia will appear on your iOS 12.4 device.
Congratulations! Enjoy your iOS 12.4 Jailbreak with Unc0ver!