iMessage and Facetime not working I have bought a new ipad 2 3G and at the present time I am using it without SIM card. I have managed to make it work barely. I can navigate the web, read emails and download apps, but I cannot use iMessages or Facetime. The device will not appear on Find my device either. 

iCloud.com says NO DEVICE. I have followed all instructions to associate my device with my Apple ID. I have indeed registered it manually on 
https://register.apple.com.... but the device is not showing associated with my AppleID even when I click to see my AppleID data.

What am I mssing? THanks.
Following on from previous answer (I can't seem to comment) it hooks to whichever one is available. For an iPad that has had a SIM card in it, it'll hook to your phone number. If you have the SIM, re-insert it and ensure it's all working, then head to iMessage and Facetime settings and add the email address to both of them. After that, you should be able to take the SIM back out and it continue functioning.