What do the blue fonts and green fonts mean when Apple sends text messages?

The blue one is IMESSAGE, which is a short message sending method with traffic. Both parties must be Apple, and there is traffic or WIFI to communicate. Green is the color of ordinary short messages. I hope my answer is helpful to you.

1. Open settings

Find "SMS"

3. Click the imessage switch and turn it on.

4. Click agree to activate, and wait for a period of time. When you create a new message, you will find that the bottom of the message will turn blue, indicating that the activation is successful and you can send free SMS.