Using iPhone in grrmany

I am in Germany for Christmas. I have a roaming package from Rogers with data and local calling. Last time I was in Europe was 2007 before having an iPhone, I had a Samsung flip phone, gsm. I was able to call canada like normal with no roaming packages. Is there something special I need to do if I wanted to call canada and I did not care about the high cost for the long distance. This an iPhone 6 plus and it will not phone canada. Any thoughts?

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