How do I register contacts for iMessages?

Ledsteplin

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Oct 2, 2013
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How do I register contacts on imessage

What do you mean by "register numbers"? Do you mean add numbers to your contacts?
 

Just_Me_D

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I want to register mobile phone numbers

If the people you want to send iMessages to have iMessage-compatible devices AND have enabled iMessage on their devices then those people will automatically be recognized. When you begin to enter their names in the recipient field when composing an iMessage, their name will display with blue coloring.