How to open international SMS iMessage on mobile terminal?

Mobile phones can send international short messages directly. When sending a short message to a foreign friend, after editing the content of the short message, enter: international code (00)+ country code+user's mobile phone number at the sending number to complete the short message sending.

And iMessage needs to be opened. First, open the phone settings, turn down to the information on the settings page, and click Enter Information. On the information page, the first thing you see is iMessage. Open the iMessage message, and then there will be a short message fee, which your operator may use to activate iMessage. This is just a reminder, there will be no charge. Click OK. It takes about 30 seconds to turn on the switch of iMessage information. You can log in with Apple ID to send and receive multimedia messages, send short messages in groups and so on. There is no charge for sending iMessage messages and MMS messages between iPhone. After iMessage is opened, we can also send the following read receipt to let the sender be notified after you read the message. After setting up, we open the iPhone message and edit the message. As long as the recipient is also using the iPhone, the words iMessage will be displayed in the title and edit box of the message, indicating that you are sending iMessage now.