Why no service on my iPhone?

So I upgraded my phone to iPhone 5, The guy said after 24 hours The sim should active on my iPhone but its been three days and still I have no service on the iPhone but I got the tariff on my old phone. How do I transfer the same number to my iphone

Contact your network provider.

It seems like they haven't updated the hlr database yet.

Hlr holds your number and the SIM card registered with that mobile number.

Hope this helps

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