Apple doesn't send text messages.

Please follow my steps except that the other party has blacklisted your number.

[1]: Please turn off the mobile phone network first.

[2]: After you turn off the network, please turn off the phone first, then take out the small card in the card slot with the card pin inserted, put it back, and then turn it on.

[3]: After the phone is turned on, please disinfect the phone twice first.

[4]: Please click Settings on the home screen.

[5]: Turn on notification in settings.

[6]: A prompt will open in the notification, and then the notification will be allowed to open.

[7]: Return to the settings page and open the information.

[8]: Open iMeSSage again.

[9]: Open by SMS.

[10]: Then open the MMS.

[1 1]: Last step, please disinfect your mobile phone again after you set it up.