What is the difference between imessage and SMS in Apple's iphone?

What is imessage?

IMessage is a chat tool in iOS devices, a bit like micro-mail, but imessage can phone video, chat, voice, SMS and so on.

the difference between imessage and SMS

IMessage send information is free and the message is charged and imessage as long as there is a network can be sent, but also can send video, address Book and location information and photos and so on and SMS can not be.

1, the point "send" when the content is blue mark, it indicates that the text is now in the form of imessage to send SMS content.

2, the point "send", the content is green mark, the display is to send by ordinary text message.

* Note: The most imessage do not need to cost as long as there is WiFi or GPRS can, and SMS is needed OH.

How to set up the imessage service

1, the iOS device click "Settings"-"Information"-"iMessage" and then turn on the switch, and then we in the "Receive mode" set the iphone contact address, enter the correct Apple ID can be.

2, imessage content and SMS content is together, but it will be shown in blue, and the text message is in the normal black display

* Note: IMessage must have both sides open this feature and imessage must both be on the network.