Why don't I have an facetime icon on my iPhone 4?

I'm really pissed at my phone. It didn't come with a facetime icon when i first got it and when i look for it i can't find it! Even in contacts, when i call a friend who has also an iphone it has to show something that say's "facetime" or something but i can't find it! I have looked for it everywhere in settings and search and i'm going crazy! Help me please!

Added (1). I mean it it's not under my contacts either! I can't find it in app store either! What the *** is the matter with my iPhone? Not even when I call someone who also has an iPhone

Its under contacts and on there name. You can also download it off of application store if you want that. It should say face time in contacts.

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