Why is the text message between my iphone and someone else's iphone an ordinary text message instead of imessage?

First of all, whether you can use iMessage is related to the other party's situation. Preconditions are: 1, ios5, iMessage function. 2. apple ID.

As long as you have these two items, when you send a message, you only need to enter the person (or number) who receives the message, and then click the input box. If the user can receive iMessage, the send button will turn blue (ordinary SMS is green), and the content of successfully sent SMS is also a blue bubble circle, which can be used to distinguish ordinary SMS from iMessage. As shown in the figure. It should be noted that iMessage(gprs, wifi, 3G) can only be used if there is a network, and there is no need to add an email address to the contact, because activating iMessage will bind the user's mobile phone number with Apple ID or email address. When you enter the number, Apple will automatically detect whether he has the conditions to receive iMessage. In addition, you can't send it directly by filling in the email, or fill in the number or contact person, and leave the rest to Apple.