HT5538: iOS and OS X: Link your phone number and Apple ID for use with FaceTime and iMessageLearn about iOS and OS X: Link your phone number and Apple ID for use with FaceTime and iMessage
Currently Being ModeratedJan 15, 2013 4:07 PM (in response to Kathleenmaryschroeder)
You can't register them. They have to do it themself.
Currently Being ModeratedJan 15, 2013 6:10 PM (in response to Kathleenmaryschroeder)
Plus, you can only mesage other Apple iDevices.
Using FaceTime http://support.apple.com/kb/ht4319
Troubleshooting FaceTime http://support.apple.com/kb/TS3367
The Complete Guide to FaceTime + iMessage: Setup, Use, and Troubleshooting
Troubleshooting FaceTime and iMessage activation
Using FaceTime and iMessage behind a firewall
iOS: About Messages
Set up iMessage
Setting Up Multiple iOS Devices for iMessage and Facetime
FaceTime and iMessage not accepting Apple ID password
Unable to use FaceTime and iMessage with my apple ID