The short message sent by the mobile phone shows that it has been received. Is it possible to be rejected?

No matter what information it is, before entering the mobile phone, the communication company's equipment must have a conversation with the mobile phone, which is like a handshake signal professionally, and then the complete information content can be sent to the mobile phone. Rejection means that the communication information is filtered out by the software in the mobile phone or its own system before entering the mobile phone. If it is found to be consistent with the set blacklist, the next receiving job will be rejected. If the denial list is registered with the communication company, the information sent will be filtered on the company's server. In other words, there is no complete information input into the mobile phone, of course you can't see it! You are eager for an answer, but you can't give a penny. Who will give you the answer next time?