Coolpad E239 did not receive the message of 1000 1. Campus broadband encryption once, you can send xykdmm to 1000 1, but you can't get a reply.

First of all, check the software you installed, whether there is any security software such as SMS firewall, or whether the firewall that comes with your machine has hacked this number.

Second, the software you installed has a malicious program, which is poisoned and the message is blocked by the virus.

Third, pay attention to the recently installed software. If not, just brush it.