IPhone 4 face time activation issues?

I have an iPhone 4 running on iOS 9, with no service. I was attempting to activate both facetime and imessage. Imessage and facetime both say waiting for activation under settings. However, imessage is working perfectly. When ever I try to make a facetime call it instantly says call failed. I even had my friend try to facetime me and it said unavalible for facetime. Are there any solutions too this?

Apple is notorious for refusing to provide support for any of their products that are older than a year or two. So I don't know what to tell you.

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