legacy pay as you go not receiving calls in Canada

She is heading back home now but I was able to confirm she was able to receive and reply to texts from me and others in the States.  The only roaming setting on her Nokia 225, if it's like my Nokia 6300, a slightly fancier dumbphone with wireless, is "data roaming," and it was on, though neither of us have data as part of this plan. She can call me from Vancouver just fine but I can't call her. I forgot to ask what roaming partner was displayed on her screen.