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How does iphone turn on imessage function?

1. Settings-Information -iMessage- Select On.

2. Then enter the normal short message interface and send a short message. If the other party has enabled iMessage, it will be automatically converted to iMessage, and the color is blue, which is different from the green of normal SMS.

3. Note that the device must be connected to the network when it is used, and the object of receiving information is also the person who opens iMessage and connects to the network.