Xhorse vvdi mini obd tool firmware can be updated via WiFi or PC. Here vvdishop.com shows how to update xhorse obd mini with PC. Fast and easy.
Check also: How to Update Mini OBD Tool via WiFi?
Download Xhorse Upgrade Kit here
Connect xhorse mini obd tool with PC via USB cable
Run Xhorse Upgrade Kit
Select MiniOBD device, Find device and run Upgrade
Wait until the update procedure is completed.