Apple has officially released iOS 12.2 beta 3 into the development community with support for all compatible iOS devices, bringing changes to Apple News, TV Remote App and Group FaceTime fix. To know more update changes about iOS 12.2 beta 3, please click here. Now you can upgrade to it using 3uTools.

Step 1 Connect your iDevice to PC with USB cable and launch 3uTools.

Step 2 Navigate to Flash & JB → Easy Flash, and select iOS 12.2 beta 3 firmware. After you click Flash, there will be a popup reminder and please read it with caution. If you want to save your data, please check the box "Retain User's Data While Flashing". 

Please back up your iDevice regularly just in case. 

Step 3 Keep a good connection and internet while flashing, wait patiently for around 5 to 10 minutes. Your device will be restored to iOS 12.2 beta 3 after reboot.