How to solve the problem that ios9.0 will automatically send international short messages?

The other party is also using the iPhone series. Then all you have to do is open imessage. When texting, as long as the other party has a bound mobile phone number. Just send your mobile phone number. It will be automatically converted to imessage after sending. If the other party doesn't have a mobile phone number bound, you need to send it to the other party's ID. In addition, the use of Imess is not recommended. ...