Ask Lenovo mobile phone to send text messages.

Failure to send information means that the information is sent to the other party through the network and the other party fails to accept it. This is because the other party can't receive it in the case of downtime or network error, and sometimes it can't receive it under normal circumstances. On average, there are 1 messages that cannot be received by the other party. This has nothing to do with mobile phones. What should be consulted is the operator's network problem.

The failure to send information is: your phone is down, you owe money, there is no signal, there is no operator and so on. First of all, you can recall that information is sent through the network. In the past, the intermediate computer would select unqualified information and send it back to the user's computer. This is an unsuccessful message transmission.

If the power outage information is sent out, it will remain in the network for 48 hours. At this time, there is no message report in your mobile phone instead of sending it failed, and you can receive the message report quickly.

There is another situation I don't know, that is, how does the mobile phone with firewall work now?