Apple this morning released the second iOS 13 Beta for developers, addressing bugs, introducing new bugs, and adding and refining iOS 13 features. There are no super exciting new changes in the second beta of iOS 13, but several features that were not functional in the first beta are now working.
You may follow the instructions below to install iOS 13 Beta 2.
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 13.0beta2. 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.