Hello Kaus,
Good day. Thank you for your question.
If are unable to send the commands via SMS then you may opt for the GPRS command. The structure will be similar but you may disregard the login, password, and <space>. For example, if you are requesting the current location information via SMS, the command will be as follows:
With login and password : <login><space><password><space>getgps
Without login and password : <space><space>getgps
But if you are sending a GPRS command, then you may just send getgps instead.
Please try this and let me know if it helps.
Kind regards.