see: How to test the SMS send script:
Location of incoming SMS: /var/spool/sms/incoming/<ID>
Delete or uncomment in the sms-control script:
// ret = nb_sms_delete(msgs[i]);\\ // if (ret == 0) nb_syslog("deleted message %s", msgs[i]);\\
The SMS won't be deleted after receiving and is available to users for further processing.
Sending SMS:
Via GUI or via cli: cli send sms +410781112223 SMStext