Dear cemkaya
Check the operating mode that is configured on your tracker. The tracker may be configured to send messages only when certain conditions are met.
For questions about setting up and operating the tracker, we recommend contacting the tracker manufacturer or seller directly. They are the ones who have the most complete competence.
If you cannot find problem, please write to us at support@gps-trace.com with the login, unit ID, screenshot of device configuration (SMS commands and device’s answers) and link to this topic, then we will try to check additionally and help you.