1. The mobile phone has been blacklisted, and blacklist information cannot be accepted.
2. The mobile phone is blocked by SMS security software.
3, mobile phone arrears.
4, wireless network, communication and other delays.
5. The number of SMS center is set incorrectly.
6. The delivery of another server failed.
There will be cases where you can't receive text messages. You can observe whether the mobile phone can accept other short messages normally and conduct an investigation.