How to set the message report of successful SMS sending on oppo R7 mobile phone?

Drop down options to find information, and then click.

Find the advanced option and click Enter.

You can see the option to submit the report. Open it.

Mobile phone sending principle:

Edit it on a terminal device, such as a mobile phone, when sending a short message, and then store it in binary. When you send it, you modulate it into a rated signal, load it on the carrier, and then forward it to the tower [also called base station] to receive the signal. Then he sends it to the local ISP computer room through the line, such as moving the computer room of a local branch. The server in the computer room buffers for the first time, and then he inquires about the data content you sent. If the number is covered by the same tower, if not, it will be forwarded to the designated tower (including other provinces). When someone else's mobile phone receives the signal and decodes it, he will also send a confirmation signal to the transmission tower. The signal will eventually be transmitted back to the forwarding tower, and the forwarding tower will forward the signal to you to confirm the success. If no signal comes back after a certain period of time, it is confirmed that the transmission has failed.