Is there a cost-effective mobile phone card in Canada? What kind of calling card is suitable for parents to travel or visit relatives?

A native of China in Toronto. Before using Rogers to make a phone call, 30 yuan 250 traffic 10 minutes a month, and I cried. However, I changed my CMLink card this year, and I think CMLink is still rare in Canada. I found that among the 10 China people around me, 7 of them are using CMLink, whether they are overseas students or overseas Chinese at work, because the discount of CMLink is too great. I believe many international students are regarded as CMLink. Overseas Chinese like us mainly like the package of CMLink. No matter what the price, local calls are not limited, and domestic calls 1000 minutes. This package is not only applicable to Canada, but also to Chinese mainland, China and Hongkong, China.