Situation 1.

Check whether the WIFI/hotspot is open
If it is turned on and then turned off automatically, select the AP band as 2.4Ghz band
Note: Individual countries do not support 5.0Ghz band, such as Japan

Situation 2.
1. Tbox flight mode on/off three times.
2. Tbox turn off Bluetooth phone, turn it on again
3. In the phone Bluetooth list, ignore/forget TBox Bluetooth
4. Tbox open Autokit
5. Reboot the phone, reconnect

Situation 3.
Android Auto can not be connected, check whether the phone is open VPN, need to close the VPN

Situation 4.
Ignore the bluetooth signal, open autokit, connect bluetooth