How to use iMessage?

I just finished testing, let me tell you, first of all, whether you can use iMessage depends on the situation of the other party. The necessary conditions are: 1. iOS5 and enable iMessage function 2. If you have an Apple ID, as long as you have these two Item, when you send a message, just enter the person (or number) to receive the text message, and then click the input box. If the user can receive iMessage, the send button will turn blue (ordinary text messages are green), and the message is successfully sent. The text message content is also blue bubble circle, which can be used to distinguish ordinary text messages from iMessage. As shown in the picture. What should be noted here is that you must have a network to use iMessage (gprs, wifi, 3G are all acceptable). There is no need to add an email address to the contacts, because activating iMessage will bind the user’s mobile phone number to the Apple ID or email address. You enter the number Apple will automatically detect whether he has the conditions to receive iMessage. In addition, if you directly fill in the email address, it will not be sent. You will still fill in only the number or contact, and leave the rest to Apple.