Send a report?

My major only knows the first question. Let me answer that.

1, let's talk about the sending process of SMS. For example, user A sends a short message to user B, and in the process of sending this short message, it will pass through the short message center of China Mobile or China Unicom. This short message center is similar to post offices all over the world. So in the process of sending, the short message will pass through this short message center (post office) of user A.

2. In order to ensure that sending SMS to user B will not go wrong, even if it goes wrong, we know that the link has gone wrong, so the technology of SMS receiving is introduced.

3. SMS receipt is just like sending a registered letter. When you send a registered letter to the post office, the post office will give you a receipt at last. Tell you when to send something to whom. The SMS receipt is the same as this.

However, ordinary people can't read and analyze this short message receipt. In order to tell users more conveniently whether your short message has been sent. Many mobile phones (almost all mobile phones) provide the function of sending receipt by SMS.

5. The function of this function is to parse the receipt of the short message sent by the short message center into words that can be read by the sender. So, if you turn on this function on your mobile phone, you will see the message: the transmission was successful.

6. However, this message does not mean that your short message has been successfully sent to User B's mobile phone. It only means that your short message was successfully sent to the short message center (equivalent to the post office). If user B is not turned on or off (that is, user B is not at home and the post office can't notify him), your message can't be sent to his mobile phone.

7. At this time, a new technology appeared, namely the "short message receipt" service launched by China Mobile. This business is free anywhere at present. His principle is to receive two receipts from the SMS center where User A and User B are located. However, the status of these two receipts is correct. The "SMS Receipt" service will send you a short message to inform you that the short message was sent successfully.

This is like, the post office of user A said that the mail was sent successfully; User B's post office said that the mail was delivered successfully. At this time, I will tell you that your email was sent successfully.

8. At present, China Mobile has added some advertisements and life information to the "SMS receipt" service. For example, the first line of the receipt you receive will generally tell you that the short message you sent to XXX users at XXX time was successfully sent. Followed by some short messages of life information and advertising information.

I don't know if I made myself clear. Remember to give points when you make it clear. Oh, hey. . . . . .