/kloc-Can the SMS sent after 0/hour be withdrawn?

Cannot be withdrawn. Once the short message is sent, it will be stored in the short message center immediately. Even if the sender is turned off, the message cannot be withdrawn. Because the SMS center is an independent system and is not influenced by the sender, the SMS sent after 1 hour will not be withdrawn. Short message refers to short message service, which is a new type of telecommunication service. Users send information directly through their mobile phones. Its characteristics are simple, fast and efficient, and it is an application of interpersonal communication.