You can use the phone as a tracker for this you need to install one of the WiaTag or Traccar Client applications.
To further configure using the WiaTag application, you need to do the following:
1) Create a unit, category and type of tracker in the application Ruhavik / GPS-Trace - Software - WiaTag, name - any, password - any, for the identifier you can take the IMEI of your phone or come up with an identifier
2) After creating the unit, you will receive the port and server
3) Now go to the WiaTag application and go to id, where you enter the data of your unit from Ruhavik (port, server, password, id) and turn on WiaTag for data transfer.
4) Now in Ruhavik you should see the location of your phone
Regarding Traccar client, You can see more details about setting up here – https://forum.gps-trace.com/d/568-we-support-traccar-client-now