Where did you send the message to the landline?

On the landline. If you didn't receive it, you should have sent it by mistake.

Short Message Service (SMS for short) refers to the text or digital information directly sent or received by users through mobile phones or other telecommunication terminals. The number of characters that users can send and receive SMS at a time is 160 English or numeric characters or 70 Chinese characters.

On April 8, 2020, China Telecom, China Mobile and China Unicom jointly issued the White Paper on 5G SMS, which made the basic SMS service in China enter a comprehensive upgrade channel, and the traditional SMS will be gradually replaced by 5G SMS (RCS service).

The inventor of mobile phone short message is Finnish. Because Nordic people are sensitive and don't like to express by phone, they invented short message on a whim. Some people on the Internet say that the inventor of SMS is Marty Cooper, an American who works for Motorola, but he invented the mobile phone, not SMS.

The world attributed the appearance of the first mobile phone in 1973 to Marty Cooper, the chief designer of Motorola at that time. It was not until nearly 20 years later that the most valuable additional service SMS of mobile phone was announced.

1992, Acision company put the first short message service center (SMSC) system into the market. Its initial design purpose was mainly to investigate and improve the reliability of the developing mobile phone market, and then Telenor, a local Norwegian telecommunications company, became the first signing company of SMSC.