1. After the box is successfully connected to the car, click on Settings
2. Click Wifi
3. Scroll down, find Hotspot&tethering, and click on it
4. Select Wifi hotspot
5. Find AP Band and click on it
6. switch the hotspot to 2.4G
Video Tutorials：https://www.youtube.com/watch?v=WWMJ1LIpK_k