Update on July 19th: Apple released public iOS 12 beta 3. As previous public beta versions, public iOS 12 beta 3 is equal to iOS 12 dev beta 4 in 3uTools. 

Apple just seeded the fourth developer beta of iOS 12 firmware. The Beta 4 update of iOS 12 doesn’t bring any new features, rather it fixes bugs and glitches present in the previous builds. Its build number is 16A5327f. Here’s how you can download it on your iPhone or iPad without a developer account on 3uTools.

Operations

Step 1 Connect your iDevice to PC with genuine USB cable, and launch 3uTools. You are recommended to back up your device before any changes. 

Step 2 Navigate to Flash & JB → Easy Flash, select the iOS 12.0beta4 firmware. If you want to save data, please click the checkbox “Retain User’s Data While Flashing”. Click “Flash” to start downloading iOS 12 beta 4.

Step 3 Please do not disconnect your iDevice and wait patiently until the process is finished, it would probably take 5 to 10 minutes. And after that your device will be restored to iOS 12 beta 4.