I can't make or receive calls on my iPhone 4s?

Ok so I updated my phone to iOS 7.1.2 & it made me restore my phone. I lost everything except my photos in my photo stream & my contacts. I can receive & send text/iMessages. I can also receive FaceTime calls. But I can't receive or make regular phone calls. I even backed up & restored my phone again & still nothing.

Buy an I phone 5

Try to reopen you iPhone

Hold down the Power Button and the Home Button until the Apple logo appears. And this should help you out a lot!

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