Nancy, I think it depends on whether you are invloved in science or arts. I don't know much about science, but if you're involved in arts, you can apply a Mphil first (you're right, this is easier), and after 2 years' study,your academic capability can be improved, your supervisor will know you more, and it is very possible for you to discuss with your supervisor on whether you're eligable to further another year's study for a phd degree. Anyway, you can get 2 years to improve your academic capability