Hello there,
Good day. Thank you for your question.
You may send the SMS command "cpureset" to the device. This will give a soft reboot to the device if the command is accepted, it can be either SMS or GPRS command. (
https://wiki.teltonika-gps.com/view/FMB_SMS/GPRS_Commands)
With login and password : <login><space><password><space>cpureset
Without login and password : <space><space>cpureset
If you are sending via GPRS then you may skip the login, password, and <space>.
Kindly try this out and let me know if it helps.
Best regards.