The information was sent but not received. What happened?

A red exclamation mark indicates that the message was not sent successfully.

There may be several reasons for this:

1, generally because the network is unstable or there is no network. Confirm that the network connection is normal and then resend it.

2. The content that violates the rules in the sent information is blocked and can be retransmitted in another way or phrase.

3. The other party has blacklisted you, but the information you sent can't be received by the other party, so the other party needs to lift the blacklist restriction.

Solution (Take vivo X9 mobile phone as an example) Check whether the number of SMS center is correct:

1, standby desktop entry setting

2. Information

3. SMS center number

4. Check whether the number of SMS center is correct.