How to send Apple's SMS in imessage format?

Specific steps to change Apple's SMS to imessage format:

1. Find "Settings" on the mobile phone desktop and enter the "Settings" page of the mobile phone to proceed with the next operation;

2. On the Settings page, slide down the page to find "Information" and click Enter;

3. Turn on the switch of iMessage to activate the receiving and sending function of iMessage;

4. After opening the iMessage function, click "Send and Receive" and log in to your apple ID account.