After the old machine Newman sent a text message,

1, the sim card is broken.

2. The current network is not smooth or the network location is not good, or the reason for the network interruption.

2. Late short messages are displayed in half because the signal in the current time period suddenly deteriorates and cannot be received.

3. The mobile phone set the SMS blacklist by mistake.

4. The mobile phone downloaded some third-party software or unknown software, which caused it to harm the mobile phone to intercept short messages.

5. The SMS center number is incorrect.