The messages that have the green background are regular SMS text messages, and they are for conversations that take place with people using non-Apple products, such as an Android or Blackberry device. You have probably noticed this before, as some of the messages that you send will show up with a green background, while some have a blue background. Your iPhone is capable of sending two different kind of messages from the Messages app. You might need to know how to send text messages instead of iMessages on an iPhone if your iMessages aren’t being sent. The difference between text messages and iMessages can be difficult to grasp, as the only indicator that there’s really a difference is the color around the message in your conversation.
