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What protocols do China Mobile, China Unicom and China Telecom use to send text messages?
Most of them are UDP protocols,
Because UDP is very fast and is a non-oriented protocol.
In other words, I send a message Here it is, it can be stored without your confirmation.
But since it is non-protocol-oriented and does not require confirmation, there may be a problem of message loss.
Friends, is there such a problem? What's the situation?
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