Not on bell. Bell doesnt use GSM, and therefor doesn't have SIM cards. Which means even if the phone is unlocked, you have no way to tie it to Bell.
But if you get unlocked phones from the states you can use Rogers or FiDo SIMs, and everything should work because US phone's use the same 3G frequencies as us.
Pre is not anything until they update the quality. Hundreds of people complaining of oreo affect, screen problems and loads of other stupid crap that a normal phone just shouldn't have. It was rushed to the market. Just like the HTC Hero, how many people here are complaining about LEDs not working, trackball LED not working, headphones not working...