Apple iOS 12.4 Beta 4 Is Available on 3utools
Apple today released the fourth developer beta of iOS 12.4. The update doesn’t yet include any visible changes for users, but it’s likely laying the groundwork for future changes.
Step 1 Connect your iDevice to PC with an original USB cable and launch 3uTools.
Step 2 Go to Flash & JB → Easy Flash, select firmware iOS 12.4beta4. If you want to upgrade with data, please check the box "Retain User's Data While Flashing". There will be a pop reminder after you click "Flash", please read it with caution.
You are recommended to back up your iDevice regularly in case of data loss.
Step 3 Keep the stabilization of network and USB connection while flashing, wait patiently for around 5 to 10 minutes. Your iDevice will be restored to iOS 12.4 Beta 4 after reboot.