The Sinotrack 901 device is capable of sending the current location via SMS, but there seems to be an issue with displaying real-time data on the Traccar server. Although the device appears online on the server, it does not transmit real-time data.
So what where the results of the troubleshooting ? You checked the logfile if the device actually sends the position data ?
https://www.traccar.org/troubleshooting/
The Sinotrack 901 device is capable of sending the current location via SMS, but there seems to be an issue with displaying real-time data on the Traccar server. Although the device appears online on the server, it does not transmit real-time data.