To check the status of SmS you send simply click 'OUTBOX' ..example below

Status shows the status of the sms

There are 4 status that you could see

1 SENT - sms has been SUCCESSFULLY sent
2 REJECTED - means you probably used a bad word that was filtered by our badword filter (sms not sent)
3 NEW - sms that has not yet been sent by our system
4 FAILED - means something is wrong with our system at the time