there are two possibilities for didn't get DATA to the server, one is the device IMEI is wrong from the server, and another possibility from the device configuration IP or port is wrong.
If you still have an issue, create a VIP help desk, or contact your sales manager. If you don't have any contacts with our Sales managers, please contact them on our official website https://teltonika-gps.com/ and click on the "Contact Us" button. When you will click, please fill out the form and submit it. Note: as a topic, please choose "Vehicle telematics". Or you can send an e-mail with a description of your situation to info@teltonika. Please follow these recommendations: https://wiki.teltonika-gps.com/view/Recommendations_for_filling_a_query_description