I don't even display the information sent by the other party.

It may be that the mobile phone network signal is difficult to receive, or the mobile phone is blocked, or the mobile phone is faulty. If you can't receive someone's information, you may have joined the blacklist, so you can't receive the information sent by the other party.

It depends. If there is nothing wrong with your network, it may be a setup problem. You blacklisted some short messages, and you can check them normally when you find the blacklist.