Excuse me for trying to help. It seems to me my answer, and the previous answer by John D. are responsive to your original (Decembe 1, 2005) question:
<< I ... want to call Canada on my cellphone without gettting charged a lot. >>
Ask your cell phone provider what your Canada rate is. You might want to consider a different plan with better roaming privileges, or the phone card option that I suggested before. Good luck.