New iPhone 5 Nano Sim Card Says No Service?

I upgraded my phone to the iPhone 5 and received it today. I inserted my new nano sim card into the phone, however, it is coming up "no service". Why is this and how do I fix it?

Should contact your carrier about that.

You have to activate your account on the new card. Contact your carrier and it should only take a few minutes. You may even be able to do it online.

You should contact to your sim card provider. They can give you better solution!

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