How to activate Facetime for iPhone 5?

I just got my iPhone yesterday and I've been trying to activate FaceTime. I turned the "off" button to "on" and it says "Waiting for activation" and it says that for a long time then it'll say "Activation failed".

Check Settings>FaceTime>On and Settings>General>Restrictions>FaceTime>… On the 4, 4s and 5 FaceTime is accessed through contacts. Go into your Contacts, access the contact you want to FaceTime with and you will see a tab at the bottom of their contact card. You can also access FaceTime by going into your Phone app, select dialling keypad, dial number, press call and an option for FaceTime on the keypad will appear. It should be noted that FaceTime has been removed from iPhones sold in some Middle Eastern countries at the express wish of the respective Governments.