Mine is Apple 4S. I send a message to my mobile phone, so everyone can send a message, except one person who sends a message indicating that it is being sent, but it has not been sent.

Everyone can send text messages to their mobile phones, but only one person who sends text messages shows that they are sending, but they can't send them all the time. There may be the following situations:

1, there is something wrong with the other party's mobile phone number, so you can't accept SMS. Just cancel sending.

2. The number is not saved to the contact person, and the mobile phone number should be written in the mobile phone bar, which may not be sent out.