If the PC has a network connection, then use that to send SMS instead.
If the PC doesn’t have a network connection, it may be better to use the modem to provide one rather than to send the text messages over GSM…
If the PC has a network connection, then use that to send SMS instead.
If the PC doesn’t have a network connection, it may be better to use the modem to provide one rather than to send the text messages over GSM…