Since trackers of different manufacturers and models work according to different protocols, it is difficult to say for sure whether your tracker corresponds to one of the protocols we support.
Please try to identify your tracker on id.wialon.net as one of the devices Xexun, Coban, Concox, YuLongDa GT06, Secumore G200, Xeelectech LK206, Xeelectech LK210, Rilla G19.
If your tracker is determined, take a screenshot, write down the name of the model of the tracker and the identified ID (may coincide with the IMEI, may be part of it with zero or without).
After that, return to the application in the unit settings (unit menu - Settings - Common Settings), specify the determined model and ID. After that, configure the tracker on the defined server and port.
Regarding the server, you can also read more information here https://forum.gps-trace.com/d/586-ip-and-dns-server-formats-in-the-application