How to Update Mini OBD Wi-Fi Firmware?

When users can't connect Mini OBD to Xhorse app via Wi-Fi, users may need to update Mini OBD Wi-Fi firmware
Repair program download link: 

Step 1.
Run "factoryTest _V1.8.exe" on PC, connect Xhorse Mini OBD to your PC, and select device port number.
select device port
Step 2.
Click this button as below.
Modify Bluetooth name
Step 3.
If it has these errors, please restart the software, re-plug your device, and try agian.
didn't detect the port number
connecting failed
Step 4.
This prompt below means the device is connected.
Then unplug the device and use a phone to update the device's Wi-Fi firmware by the Wi-Fi connection method. You need to use the phone to connect another Wi-Fi or hotspot (don't use your phone's hotspot) to update the device's Wi-Fi firmware.
connecting successfully