What kind of mobile phone should I buy in Canada?

You don't need to buy a mobile phone in Canada. The largest mobile operator in Canada is called Rogers. Signing a user contract is similar to a business that takes several years. If you spend more money every month, you will get an ordinary mobile phone. Iphone is only 199 Canadian dollars there. I suggest buying it there. If you have to buy it in China, you can use it as long as it is a three-band mobile phone. (Tri-band is different from 3G. Now basically all mobile phones are tri-band.)