Good day. Thank you for your question.
May I know if you have tried replacing the USB cable, or if you have other devices that are working with the same USB cable? I would suggest that you reach out to us via the VIP Helpdesk or contact your Sales Manager so we can analyze the device better. If you don't have any contacts with our Sales managers, please contact with them on our official website https://teltonika-gps.com/
and click on the "Contact Us" button. When you will click, please fill the form and submit it.
Note: as a topic, please choose "Vehicle telematics" or you can send an e-mail with the description of your situation to firstname.lastname@example.org
Thank you for your understanding.