Can make phone calls and receive text messages, but can't send out text messages.

Please try to solve the problem in the following ways:

Please check whether there is any arrears on the SIM card, and the suspension of arrears will affect the mobile phone communication.

please confirm whether the SMS center number is set correctly, and consult the operator for details.

please check whether there are sensitive words in the short message content, or send repeated short messages to the same number, which will be blocked by the operator. Please consult your local operator for details.

please check whether you have set a blacklist in "mobile phone housekeeper", so that the short message is blocked and cannot be received. If so, please delete the number from the blacklist and try again.

please check whether there is any third-party application intercepting the short messages. Some security management applications will intelligently filter the received short messages. It is recommended to uninstall this application.

the mobile phone is in a place with no signal or weak signal, and the message may not be sent successfully. Please try again where the signal is strong.

The network system is busy, especially during the peak period of holiday information sending, so the information may not be sent successfully. Please avoid the peak period and try again.

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