What if the SMS of CDB is deleted?

If the short message is not backed up, it is generally unrecoverable after accidental deletion. If you are a Unicom user, you need to check the details of SMS and MMS. After logging in to China Unicom's mobile phone business hall, you can click Service > Inquiry > Telephone Fee Business Inquiry > SMS MMS Details on the homepage to inquire about the details of SMS MMS within six months (SMS MMS Details only provide the records of the last six months).

Short Message Service (SMS) is a part of Unified Communications 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, numeric characters or 70 Chinese characters.

Short message 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.

1992, when the world's first short message was successfully sent to a mobile phone on the GSM network in Wolfen, England, no one would have thought that this low-cost short message service, which was originally launched by telecom operators to solve the high telephone bill, would have such a huge impact on people's economic and cultural life and even politics many years later.