How does oppo r9 plus send SMS regularly?

Download a short message, and the housekeeper can send short messages regularly.

1, short message service (SMS) is a part of unified communication service plan. Users can directly send or receive text or digital information through mobile phones or other telecommunication terminals. The number of characters that users can receive and send short messages at a time is 160 English, numbers or 70 Chinese characters.

2. SMS is a telecommunication service in digital mobile communication system. It is a non-real-time and non-voice data communication service to transmit text or digital short messages through the signaling channel and signaling network of mobile communication system.