What if Huawei g9 plus can't send and receive SMS?

please check whether the mobile phone is in arrears. If it is in arrears, you can't send and receive short messages.

is the SMS center number set correctly? Please consult the operator for details.

check whether there are sensitive words in the content of the short message, or send duplicate content to the same number, which is blocked by the operator. You can consult the local operator.

or did you set a blacklist in the mobile phone housekeeper, which caused the short message to be intercepted and could not be received. If so, delete the number from the blacklist and try again.

Are there any third-party applications that intercept short messages? Some security management applications will intelligently filter the received short messages. It is recommended to uninstall this application.

if the mobile phone is in a place where there is no signal or the signal is weak, the message may not be sent successfully. You can try again where the signal is strong.

In addition, the network system is busy, especially during the peak period of holiday information transmission, and the transmission may fail. It is recommended to avoid the peak period.

if you can't receive the SMS sent by Apple's mobile phone, the information sent by other mobile phones will be received normally. It may be because your mobile phone number has been bound to an Apple device before, and the opposite party sent you an iMessage instead of an ordinary SMS. You can refer to Apple's official instructions to unbind the phone number from the iPhone device.

In addition, there are two types of SMS that can be sent by Apple's mobile phone, one is ordinary SMS for a fee; The other is Apple's unique iMessage message, which is free and sent through data traffic. It can only be used between Apple phones, and other phones cannot receive it.

if the above methods can't be solved, it's recommended to restore the factory settings or upgrade the mobile phone system after backing up important information, and then try again.