IPhone won't recognize a new carrier?

I traveled to Sweden and my carrier is not opening here. My carrier is compatible with Sweden but it doesn't open in Sweden. I tried to put this carrier in another phone and it worked. I tried to put a Swedish SIM card in my iPhone and it worked. I restored my iPhone but still nothing happened it still sais no service at the top left of my phone. I reset network settings and nothing worked. My carrier is updated. I have the latest ios 7.1.1 and I'm not jailbroken.

You did not tell your phone provider before you left that you were going abroad, so they did not authorize your SIM card for roaming.

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