How do I register a person on iMessage?

[iMore Question]

iMessage - register a person

How to register a person on iMessage so I can send a message

 

[kataran]

Re: iMessage - register a person

There's no registration required to use iMessage you simply enable iMessage in settings and as long as your recipient is using an iDevice and has there iMessage enable you will see your text bubble in blue instead of green.

Data usage applies for iMessage