Do you need a sim card to use facetime on the new ipad or can you use it just using wifi?
I am not sure how you can connect without a phone number hence the question anyone who can shed light on this would be greatly appreciated
Using FaceTime > http://support.apple.com/kb/ht4319
You can use wifi or cellular.
The Complete Guide to FaceTime: Set-up, Use, and Troubleshooting Problems
For someone to FaceTime you, they need your e-mail address which can also be your Apple ID.
If you FaceTime someone who has an enabled iPhone you can use their phone number to connect.
FaceTime can use Wi-Fi and if carrier allowed also over cellular.
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