How many status reports are there after the enhanced SMS receipt is sent?

Enhanced short message receipt service means that when sending a peer-to-peer short message to a friend, the system will reply a status receipt short message to inform whether the short message was sent successfully; Receipt SMS contains additional information, covering cultural entertainment, life and health, practical common sense, hot events and other fields.

Enhanced SMS receipt has the following status reports:

1, sent successfully: after sending the SMS, the other party will receive it immediately;

2. Not delivered yet: after sending the SMS, it cannot be delivered to the other party in time due to reasons such as power off, out of service area or full SMS space;

3. Sending failed: the other party's number does not exist, or the other party has been turned off for a long time.