Thank you for reading this article,in which you can know the statuses of SMS and what they mean.
There are several statuses of SMS:
queue:the message is sent to the queue.
sent: IntBell successfully sent the message to the carrier.
delivered:the message was successfully delivered.
undelivered:the message was sent,but the other side couldn't receive it.
failed: InBell was unable to send the message to the carrier.